644 lines
No EOL
19 KiB
TypeScript
644 lines
No EOL
19 KiB
TypeScript
/**
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* Methods for traversing the DOM structure.
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*
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* @module cheerio/traversing
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*/
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import { Node, Element, Document } from 'domhandler';
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import type { Cheerio } from '../cheerio';
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import type { AcceptedFilters } from '../types';
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/**
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* Get the descendants of each element in the current set of matched elements,
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* filtered by a selector, jQuery object, or element.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('#fruits').find('li').length;
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* //=> 3
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* $('#fruits').find($('.apple')).length;
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* //=> 1
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* ```
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*
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* @param selectorOrHaystack - Element to look for.
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* @returns The found elements.
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* @see {@link https://api.jquery.com/find/}
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*/
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export declare function find<T extends Node>(this: Cheerio<T>, selectorOrHaystack?: string | Cheerio<Element> | Element): Cheerio<Element>;
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/**
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* Get the parent of each element in the current set of matched elements,
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* optionally filtered by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.pear').parent().attr('id');
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* //=> fruits
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* ```
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*
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* @param selector - If specified filter for parent.
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* @returns The parents.
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* @see {@link https://api.jquery.com/parent/}
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*/
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export declare const parent: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Get a set of parents filtered by `selector` of each element in the current
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* set of match elements.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.orange').parents().length;
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* //=> 2
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* $('.orange').parents('#fruits').length;
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* //=> 1
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* ```
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*
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* @param selector - If specified filter for parents.
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* @returns The parents.
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* @see {@link https://api.jquery.com/parents/}
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*/
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export declare const parents: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Get the ancestors of each element in the current set of matched elements, up
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* to but not including the element matched by the selector, DOM node, or cheerio object.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.orange').parentsUntil('#food').length;
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* //=> 1
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* ```
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*
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* @param selector - Selector for element to stop at.
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* @param filterSelector - Optional filter for parents.
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* @returns The parents.
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* @see {@link https://api.jquery.com/parentsUntil/}
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*/
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export declare const parentsUntil: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | null | undefined, filterSelector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* For each element in the set, get the first element that matches the selector
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* by testing the element itself and traversing up through its ancestors in the DOM tree.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.orange').closest();
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* //=> []
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*
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* $('.orange').closest('.apple');
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* // => []
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*
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* $('.orange').closest('li');
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* //=> [<li class="orange">Orange</li>]
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*
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* $('.orange').closest('#fruits');
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* //=> [<ul id="fruits"> ... </ul>]
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* ```
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*
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* @param selector - Selector for the element to find.
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* @returns The closest nodes.
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* @see {@link https://api.jquery.com/closest/}
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*/
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export declare function closest<T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Node>): Cheerio<Node>;
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/**
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* Gets the next sibling of the first selected element, optionally filtered by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.apple').next().hasClass('orange');
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* //=> true
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* ```
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*
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* @param selector - If specified filter for sibling.
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* @returns The next nodes.
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* @see {@link https://api.jquery.com/next/}
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*/
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export declare const next: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets all the following siblings of the first selected element, optionally
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* filtered by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.apple').nextAll();
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* //=> [<li class="orange">Orange</li>, <li class="pear">Pear</li>]
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* $('.apple').nextAll('.orange');
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* //=> [<li class="orange">Orange</li>]
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* ```
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*
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* @param selector - If specified filter for siblings.
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* @returns The next nodes.
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* @see {@link https://api.jquery.com/nextAll/}
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*/
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export declare const nextAll: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets all the following siblings up to but not including the element matched
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* by the selector, optionally filtered by another selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.apple').nextUntil('.pear');
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* //=> [<li class="orange">Orange</li>]
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* ```
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*
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* @param selector - Selector for element to stop at.
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* @param filterSelector - If specified filter for siblings.
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* @returns The next nodes.
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* @see {@link https://api.jquery.com/nextUntil/}
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*/
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export declare const nextUntil: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | null | undefined, filterSelector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets the previous sibling of the first selected element optionally filtered
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* by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.orange').prev().hasClass('apple');
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* //=> true
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* ```
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*
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* @param selector - If specified filter for siblings.
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* @returns The previous nodes.
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* @see {@link https://api.jquery.com/prev/}
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*/
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export declare const prev: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets all the preceding siblings of the first selected element, optionally
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* filtered by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.pear').prevAll();
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* //=> [<li class="orange">Orange</li>, <li class="apple">Apple</li>]
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*
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* $('.pear').prevAll('.orange');
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* //=> [<li class="orange">Orange</li>]
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* ```
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*
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* @param selector - If specified filter for siblings.
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* @returns The previous nodes.
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* @see {@link https://api.jquery.com/prevAll/}
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*/
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export declare const prevAll: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets all the preceding siblings up to but not including the element matched
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* by the selector, optionally filtered by another selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.pear').prevUntil('.apple');
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* //=> [<li class="orange">Orange</li>]
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* ```
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*
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* @param selector - Selector for element to stop at.
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* @param filterSelector - If specified filter for siblings.
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* @returns The previous nodes.
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* @see {@link https://api.jquery.com/prevUntil/}
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*/
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export declare const prevUntil: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | null | undefined, filterSelector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Get the siblings of each element (excluding the element) in the set of
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* matched elements, optionally filtered by a selector.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('.pear').siblings().length;
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* //=> 2
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*
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* $('.pear').siblings('.orange').length;
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* //=> 1
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* ```
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*
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* @param selector - If specified filter for siblings.
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* @returns The siblings.
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* @see {@link https://api.jquery.com/siblings/}
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*/
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export declare const siblings: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets the children of the first selected element.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('#fruits').children().length;
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* //=> 3
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*
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* $('#fruits').children('.pear').text();
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* //=> Pear
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* ```
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*
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* @param selector - If specified filter for children.
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* @returns The children.
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* @see {@link https://api.jquery.com/children/}
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*/
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export declare const children: <T extends Node>(this: Cheerio<T>, selector?: AcceptedFilters<Element> | undefined) => Cheerio<Element>;
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/**
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* Gets the children of each element in the set of matched elements, including
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* text and comment nodes.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('#fruits').contents().length;
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* //=> 3
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* ```
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*
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* @returns The children.
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* @see {@link https://api.jquery.com/contents/}
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*/
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export declare function contents<T extends Node>(this: Cheerio<T>): Cheerio<Node>;
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/**
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* Iterates over a cheerio object, executing a function for each matched
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* element. When the callback is fired, the function is fired in the context of
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* the DOM element, so `this` refers to the current element, which is equivalent
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* to the function parameter `element`. To break out of the `each` loop early,
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* return with `false`.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* const fruits = [];
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*
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* $('li').each(function (i, elem) {
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* fruits[i] = $(this).text();
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* });
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*
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* fruits.join(', ');
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* //=> Apple, Orange, Pear
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* ```
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*
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* @param fn - Function to execute.
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* @returns The instance itself, useful for chaining.
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* @see {@link https://api.jquery.com/each/}
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*/
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export declare function each<T>(this: Cheerio<T>, fn: (this: T, i: number, el: T) => void | boolean): Cheerio<T>;
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/**
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* Pass each element in the current matched set through a function, producing a
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* new Cheerio object containing the return values. The function can return an
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* individual data item or an array of data items to be inserted into the
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* resulting set. If an array is returned, the elements inside the array are
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* inserted into the set. If the function returns null or undefined, no element
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* will be inserted.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('li')
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* .map(function (i, el) {
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* // this === el
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* return $(this).text();
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* })
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* .toArray()
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* .join(' ');
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* //=> "apple orange pear"
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* ```
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*
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* @param fn - Function to execute.
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* @returns The mapped elements, wrapped in a Cheerio collection.
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* @see {@link https://api.jquery.com/map/}
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*/
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export declare function map<T, M>(this: Cheerio<T>, fn: (this: T, i: number, el: T) => M[] | M | null | undefined): Cheerio<M>;
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/**
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* Iterates over a cheerio object, reducing the set of selector elements to
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* those that match the selector or pass the function's test.
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*
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* This is the definition for using type guards; have a look below for other
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* ways to invoke this method. The function is executed in the context of the
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* selected element, so `this` refers to the current element.
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*
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* @category Traversing
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* @example <caption>Function</caption>
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*
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* ```js
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* $('li')
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* .filter(function (i, el) {
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* // this === el
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* return $(this).attr('class') === 'orange';
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* })
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* .attr('class'); //=> orange
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* ```
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*
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* @param match - Value to look for, following the rules above.
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* @returns The filtered collection.
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* @see {@link https://api.jquery.com/filter/}
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*/
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export declare function filter<T, S extends T>(this: Cheerio<T>, match: (this: T, index: number, value: T) => value is S): Cheerio<S>;
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/**
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* Iterates over a cheerio object, reducing the set of selector elements to
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* those that match the selector or pass the function's test.
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*
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* - When a Cheerio selection is specified, return only the elements contained in
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* that selection.
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* - When an element is specified, return only that element (if it is contained in
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* the original selection).
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* - If using the function method, the function is executed in the context of the
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* selected element, so `this` refers to the current element.
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*
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* @category Traversing
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* @example <caption>Selector</caption>
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*
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* ```js
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* $('li').filter('.orange').attr('class');
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* //=> orange
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* ```
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*
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* @example <caption>Function</caption>
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*
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* ```js
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* $('li')
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* .filter(function (i, el) {
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* // this === el
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* return $(this).attr('class') === 'orange';
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* })
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* .attr('class'); //=> orange
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* ```
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*
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* @param match - Value to look for, following the rules above. See
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* {@link AcceptedFilters}.
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* @returns The filtered collection.
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* @see {@link https://api.jquery.com/filter/}
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*/
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export declare function filter<T, S extends AcceptedFilters<T>>(this: Cheerio<T>, match: S): Cheerio<S extends string ? Element : T>;
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export declare function filterArray<T>(nodes: T[], match: AcceptedFilters<T>, xmlMode?: boolean, root?: Document): Element[] | T[];
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/**
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* Checks the current list of elements and returns `true` if *any* of the
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* elements match the selector. If using an element or Cheerio selection,
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* returns `true` if *any* of the elements match. If using a predicate function,
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* the function is executed in the context of the selected element, so `this`
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* refers to the current element.
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*
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* @category Attributes
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* @param selector - Selector for the selection.
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* @returns Whether or not the selector matches an element of the instance.
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* @see {@link https://api.jquery.com/is/}
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*/
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export declare function is<T>(this: Cheerio<T>, selector?: AcceptedFilters<T>): boolean;
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/**
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* Remove elements from the set of matched elements. Given a Cheerio object that
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* represents a set of DOM elements, the `.not()` method constructs a new
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* Cheerio object from a subset of the matching elements. The supplied selector
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* is tested against each element; the elements that don't match the selector
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* will be included in the result.
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*
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* The `.not()` method can take a function as its argument in the same way that
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* `.filter()` does. Elements for which the function returns `true` are excluded
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* from the filtered set; all other elements are included.
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*
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* @category Traversing
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* @example <caption>Selector</caption>
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*
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* ```js
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* $('li').not('.apple').length;
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* //=> 2
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* ```
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*
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* @example <caption>Function</caption>
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*
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* ```js
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* $('li').not(function (i, el) {
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* // this === el
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* return $(this).attr('class') === 'orange';
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* }).length; //=> 2
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* ```
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*
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* @param match - Value to look for, following the rules above.
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* @param container - Optional node to filter instead.
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* @returns The filtered collection.
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* @see {@link https://api.jquery.com/not/}
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*/
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export declare function not<T extends Node>(this: Cheerio<T>, match: AcceptedFilters<T>): Cheerio<T>;
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/**
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* Filters the set of matched elements to only those which have the given DOM
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* element as a descendant or which have a descendant that matches the given
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* selector. Equivalent to `.filter(':has(selector)')`.
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*
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* @category Traversing
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* @example <caption>Selector</caption>
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*
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* ```js
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* $('ul').has('.pear').attr('id');
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* //=> fruits
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* ```
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*
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* @example <caption>Element</caption>
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*
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* ```js
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* $('ul').has($('.pear')[0]).attr('id');
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* //=> fruits
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* ```
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*
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* @param selectorOrHaystack - Element to look for.
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* @returns The filtered collection.
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* @see {@link https://api.jquery.com/has/}
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*/
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export declare function has(this: Cheerio<Node | Element>, selectorOrHaystack: string | Cheerio<Element> | Element): Cheerio<Node | Element>;
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/**
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* Will select the first element of a cheerio object.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('#fruits').children().first().text();
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* //=> Apple
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* ```
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*
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* @returns The first element.
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* @see {@link https://api.jquery.com/first/}
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*/
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export declare function first<T extends Node>(this: Cheerio<T>): Cheerio<T>;
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/**
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* Will select the last element of a cheerio object.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('#fruits').children().last().text();
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* //=> Pear
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* ```
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*
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* @returns The last element.
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* @see {@link https://api.jquery.com/last/}
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*/
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export declare function last<T>(this: Cheerio<T>): Cheerio<T>;
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/**
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* Reduce the set of matched elements to the one at the specified index. Use
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* `.eq(-i)` to count backwards from the last selected element.
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*
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* @category Traversing
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* @example
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*
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* ```js
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* $('li').eq(0).text();
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* //=> Apple
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*
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* $('li').eq(-1).text();
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* //=> Pear
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* ```
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|
*
|
|
* @param i - Index of the element to select.
|
|
* @returns The element at the `i`th position.
|
|
* @see {@link https://api.jquery.com/eq/}
|
|
*/
|
|
export declare function eq<T>(this: Cheerio<T>, i: number): Cheerio<T>;
|
|
/**
|
|
* Retrieve one of the elements matched by the Cheerio object, at the `i`th position.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').get(0).tagName;
|
|
* //=> li
|
|
* ```
|
|
*
|
|
* @param i - Element to retrieve.
|
|
* @returns The element at the `i`th position.
|
|
* @see {@link https://api.jquery.com/get/}
|
|
*/
|
|
export declare function get<T>(this: Cheerio<T>, i: number): T;
|
|
/**
|
|
* Retrieve all elements matched by the Cheerio object, as an array.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').get().length;
|
|
* //=> 3
|
|
* ```
|
|
*
|
|
* @returns All elements matched by the Cheerio object.
|
|
* @see {@link https://api.jquery.com/get/}
|
|
*/
|
|
export declare function get<T>(this: Cheerio<T>): T[];
|
|
/**
|
|
* Retrieve all the DOM elements contained in the jQuery set as an array.
|
|
*
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').toArray();
|
|
* //=> [ {...}, {...}, {...} ]
|
|
* ```
|
|
*
|
|
* @returns The contained items.
|
|
*/
|
|
export declare function toArray<T>(this: Cheerio<T>): T[];
|
|
/**
|
|
* Search for a given element from among the matched elements.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('.pear').index();
|
|
* //=> 2 $('.orange').index('li');
|
|
* //=> 1
|
|
* $('.apple').index($('#fruit, li'));
|
|
* //=> 1
|
|
* ```
|
|
*
|
|
* @param selectorOrNeedle - Element to look for.
|
|
* @returns The index of the element.
|
|
* @see {@link https://api.jquery.com/index/}
|
|
*/
|
|
export declare function index<T extends Node>(this: Cheerio<T>, selectorOrNeedle?: string | Cheerio<Node> | Node): number;
|
|
/**
|
|
* Gets the elements matching the specified range (0-based position).
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').slice(1).eq(0).text();
|
|
* //=> 'Orange'
|
|
*
|
|
* $('li').slice(1, 2).length;
|
|
* //=> 1
|
|
* ```
|
|
*
|
|
* @param start - An position at which the elements begin to be selected. If
|
|
* negative, it indicates an offset from the end of the set.
|
|
* @param end - An position at which the elements stop being selected. If
|
|
* negative, it indicates an offset from the end of the set. If omitted, the
|
|
* range continues until the end of the set.
|
|
* @returns The elements matching the specified range.
|
|
* @see {@link https://api.jquery.com/slice/}
|
|
*/
|
|
export declare function slice<T>(this: Cheerio<T>, start?: number, end?: number): Cheerio<T>;
|
|
/**
|
|
* End the most recent filtering operation in the current chain and return the
|
|
* set of matched elements to its previous state.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').eq(0).end().length;
|
|
* //=> 3
|
|
* ```
|
|
*
|
|
* @returns The previous state of the set of matched elements.
|
|
* @see {@link https://api.jquery.com/end/}
|
|
*/
|
|
export declare function end<T>(this: Cheerio<T>): Cheerio<Node>;
|
|
/**
|
|
* Add elements to the set of matched elements.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('.apple').add('.orange').length;
|
|
* //=> 2
|
|
* ```
|
|
*
|
|
* @param other - Elements to add.
|
|
* @param context - Optionally the context of the new selection.
|
|
* @returns The combined set.
|
|
* @see {@link https://api.jquery.com/add/}
|
|
*/
|
|
export declare function add<S extends Node, T extends Node>(this: Cheerio<T>, other: string | Cheerio<S> | S | S[], context?: Cheerio<S> | string): Cheerio<S | T>;
|
|
/**
|
|
* Add the previous set of elements on the stack to the current set, optionally
|
|
* filtered by a selector.
|
|
*
|
|
* @category Traversing
|
|
* @example
|
|
*
|
|
* ```js
|
|
* $('li').eq(0).addBack('.orange').length;
|
|
* //=> 2
|
|
* ```
|
|
*
|
|
* @param selector - Selector for the elements to add.
|
|
* @returns The combined set.
|
|
* @see {@link https://api.jquery.com/addBack/}
|
|
*/
|
|
export declare function addBack<T extends Node>(this: Cheerio<T>, selector?: string): Cheerio<Node>;
|
|
//# sourceMappingURL=traversing.d.ts.map
|