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/**
* Methods for modifying the DOM structure.
*
* @module cheerio/manipulation
*/
import { Text, hasChildren } from 'domhandler';
import { update as updateDOM } from '../parse.js';
import { text as staticText } from '../static.js';
import { domEach, cloneDom, isTag, isHtml, isCheerio } from '../utils.js';
import { removeElement } from 'domutils';
/**
* Create an array of nodes, recursing into arrays and parsing strings if necessary.
*
* @private
* @category Manipulation
* @param elem - Elements to make an array of.
* @param clone - Optionally clone nodes.
* @returns The array of nodes.
*/
export function _makeDomArray(elem, clone) {
if (elem == null) {
return [];
}
if (isCheerio(elem)) {
return clone ? cloneDom(elem.get()) : elem.get();
}
if (Array.isArray(elem)) {
return elem.reduce((newElems, el) => newElems.concat(this._makeDomArray(el, clone)), []);
}
if (typeof elem === 'string') {
return this._parse(elem, this.options, false, null).children;
}
return clone ? cloneDom([elem]) : [elem];
}
function _insert(concatenator) {
return function (...elems) {
const lastIdx = this.length - 1;
return domEach(this, (el, i) => {
if (!hasChildren(el))
return;
const domSrc = typeof elems[0] === 'function'
? elems[0].call(el, i, this._render(el.children))
: elems;
const dom = this._makeDomArray(domSrc, i < lastIdx);
concatenator(dom, el.children, el);
});
};
}
/**
* Modify an array in-place, removing some number of elements and adding new
* elements directly following them.
*
* @private
* @category Manipulation
* @param array - Target array to splice.
* @param spliceIdx - Index at which to begin changing the array.
* @param spliceCount - Number of elements to remove from the array.
* @param newElems - Elements to insert into the array.
* @param parent - The parent of the node.
* @returns The spliced array.
*/
function uniqueSplice(array, spliceIdx, spliceCount, newElems, parent) {
var _a, _b;
const spliceArgs = [
spliceIdx,
spliceCount,
...newElems,
];
const prev = spliceIdx === 0 ? null : array[spliceIdx - 1];
const next = spliceIdx + spliceCount >= array.length
? null
: array[spliceIdx + spliceCount];
/*
* Before splicing in new elements, ensure they do not already appear in the
* current array.
*/
for (let idx = 0; idx < newElems.length; ++idx) {
const node = newElems[idx];
const oldParent = node.parent;
if (oldParent) {
const oldSiblings = oldParent.children;
const prevIdx = oldSiblings.indexOf(node);
if (prevIdx > -1) {
oldParent.children.splice(prevIdx, 1);
if (parent === oldParent && spliceIdx > prevIdx) {
spliceArgs[0]--;
}
}
}
node.parent = parent;
if (node.prev) {
node.prev.next = (_a = node.next) !== null && _a !== void 0 ? _a : null;
}
if (node.next) {
node.next.prev = (_b = node.prev) !== null && _b !== void 0 ? _b : null;
}
node.prev = idx === 0 ? prev : newElems[idx - 1];
node.next = idx === newElems.length - 1 ? next : newElems[idx + 1];
}
if (prev) {
prev.next = newElems[0];
}
if (next) {
next.prev = newElems[newElems.length - 1];
}
return array.splice(...spliceArgs);
}
/**
* Insert every element in the set of matched elements to the end of the target.
*
* @category Manipulation
* @example
*
* ```js
* $('<li class="plum">Plum</li>').appendTo('#fruits');
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // <li class="plum">Plum</li>
* // </ul>
* ```
*
* @param target - Element to append elements to.
* @returns The instance itself.
* @see {@link https://api.jquery.com/appendTo/}
*/
export function appendTo(target) {
const appendTarget = isCheerio(target) ? target : this._make(target);
appendTarget.append(this);
return this;
}
/**
* Insert every element in the set of matched elements to the beginning of the target.
*
* @category Manipulation
* @example
*
* ```js
* $('<li class="plum">Plum</li>').prependTo('#fruits');
* $.html();
* //=> <ul id="fruits">
* // <li class="plum">Plum</li>
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @param target - Element to prepend elements to.
* @returns The instance itself.
* @see {@link https://api.jquery.com/prependTo/}
*/
export function prependTo(target) {
const prependTarget = isCheerio(target) ? target : this._make(target);
prependTarget.prepend(this);
return this;
}
/**
* Inserts content as the _last_ child of each of the selected elements.
*
* @category Manipulation
* @example
*
* ```js
* $('ul').append('<li class="plum">Plum</li>');
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // <li class="plum">Plum</li>
* // </ul>
* ```
*
* @see {@link https://api.jquery.com/append/}
*/
export const append = _insert((dom, children, parent) => {
uniqueSplice(children, children.length, 0, dom, parent);
});
/**
* Inserts content as the _first_ child of each of the selected elements.
*
* @category Manipulation
* @example
*
* ```js
* $('ul').prepend('<li class="plum">Plum</li>');
* $.html();
* //=> <ul id="fruits">
* // <li class="plum">Plum</li>
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @see {@link https://api.jquery.com/prepend/}
*/
export const prepend = _insert((dom, children, parent) => {
uniqueSplice(children, 0, 0, dom, parent);
});
function _wrap(insert) {
return function (wrapper) {
const lastIdx = this.length - 1;
const lastParent = this.parents().last();
for (let i = 0; i < this.length; i++) {
const el = this[i];
const wrap = typeof wrapper === 'function'
? wrapper.call(el, i, el)
: typeof wrapper === 'string' && !isHtml(wrapper)
? lastParent.find(wrapper).clone()
: wrapper;
const [wrapperDom] = this._makeDomArray(wrap, i < lastIdx);
if (!wrapperDom || !hasChildren(wrapperDom))
continue;
let elInsertLocation = wrapperDom;
/*
* Find the deepest child. Only consider the first tag child of each node
* (ignore text); stop if no children are found.
*/
let j = 0;
while (j < elInsertLocation.children.length) {
const child = elInsertLocation.children[j];
if (isTag(child)) {
elInsertLocation = child;
j = 0;
}
else {
j++;
}
}
insert(el, elInsertLocation, [wrapperDom]);
}
return this;
};
}
/**
* The .wrap() function can take any string or object that could be passed to
* the $() factory function to specify a DOM structure. This structure may be
* nested several levels deep, but should contain only one inmost element. A
* copy of this structure will be wrapped around each of the elements in the set
* of matched elements. This method returns the original set of elements for
* chaining purposes.
*
* @category Manipulation
* @example
*
* ```js
* const redFruit = $('<div class="red-fruit"></div>');
* $('.apple').wrap(redFruit);
*
* //=> <ul id="fruits">
* // <div class="red-fruit">
* // <li class="apple">Apple</li>
* // </div>
* // <li class="orange">Orange</li>
* // <li class="plum">Plum</li>
* // </ul>
*
* const healthy = $('<div class="healthy"></div>');
* $('li').wrap(healthy);
*
* //=> <ul id="fruits">
* // <div class="healthy">
* // <li class="apple">Apple</li>
* // </div>
* // <div class="healthy">
* // <li class="orange">Orange</li>
* // </div>
* // <div class="healthy">
* // <li class="plum">Plum</li>
* // </div>
* // </ul>
* ```
*
* @param wrapper - The DOM structure to wrap around each element in the selection.
* @see {@link https://api.jquery.com/wrap/}
*/
export const wrap = _wrap((el, elInsertLocation, wrapperDom) => {
const { parent } = el;
if (!parent)
return;
const siblings = parent.children;
const index = siblings.indexOf(el);
updateDOM([el], elInsertLocation);
/*
* The previous operation removed the current element from the `siblings`
* array, so the `dom` array can be inserted without removing any
* additional elements.
*/
uniqueSplice(siblings, index, 0, wrapperDom, parent);
});
/**
* The .wrapInner() function can take any string or object that could be passed
* to the $() factory function to specify a DOM structure. This structure may be
* nested several levels deep, but should contain only one inmost element. The
* structure will be wrapped around the content of each of the elements in the
* set of matched elements.
*
* @category Manipulation
* @example
*
* ```js
* const redFruit = $('<div class="red-fruit"></div>');
* $('.apple').wrapInner(redFruit);
*
* //=> <ul id="fruits">
* // <li class="apple">
* // <div class="red-fruit">Apple</div>
* // </li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
*
* const healthy = $('<div class="healthy"></div>');
* $('li').wrapInner(healthy);
*
* //=> <ul id="fruits">
* // <li class="apple">
* // <div class="healthy">Apple</div>
* // </li>
* // <li class="orange">
* // <div class="healthy">Orange</div>
* // </li>
* // <li class="pear">
* // <div class="healthy">Pear</div>
* // </li>
* // </ul>
* ```
*
* @param wrapper - The DOM structure to wrap around the content of each element
* in the selection.
* @returns The instance itself, for chaining.
* @see {@link https://api.jquery.com/wrapInner/}
*/
export const wrapInner = _wrap((el, elInsertLocation, wrapperDom) => {
if (!hasChildren(el))
return;
updateDOM(el.children, elInsertLocation);
updateDOM(wrapperDom, el);
});
/**
* The .unwrap() function, removes the parents of the set of matched elements
* from the DOM, leaving the matched elements in their place.
*
* @category Manipulation
* @example <caption>without selector</caption>
*
* ```js
* const $ = cheerio.load(
* '<div id=test>\n <div><p>Hello</p></div>\n <div><p>World</p></div>\n</div>'
* );
* $('#test p').unwrap();
*
* //=> <div id=test>
* // <p>Hello</p>
* // <p>World</p>
* // </div>
* ```
*
* @example <caption>with selector</caption>
*
* ```js
* const $ = cheerio.load(
* '<div id=test>\n <p>Hello</p>\n <b><p>World</p></b>\n</div>'
* );
* $('#test p').unwrap('b');
*
* //=> <div id=test>
* // <p>Hello</p>
* // <p>World</p>
* // </div>
* ```
*
* @param selector - A selector to check the parent element against. If an
* element's parent does not match the selector, the element won't be unwrapped.
* @returns The instance itself, for chaining.
* @see {@link https://api.jquery.com/unwrap/}
*/
export function unwrap(selector) {
this.parent(selector)
.not('body')
.each((_, el) => {
this._make(el).replaceWith(el.children);
});
return this;
}
/**
* The .wrapAll() function can take any string or object that could be passed to
* the $() function to specify a DOM structure. This structure may be nested
* several levels deep, but should contain only one inmost element. The
* structure will be wrapped around all of the elements in the set of matched
* elements, as a single group.
*
* @category Manipulation
* @example <caption>With markup passed to `wrapAll`</caption>
*
* ```js
* const $ = cheerio.load(
* '<div class="container"><div class="inner">First</div><div class="inner">Second</div></div>'
* );
* $('.inner').wrapAll("<div class='new'></div>");
*
* //=> <div class="container">
* // <div class='new'>
* // <div class="inner">First</div>
* // <div class="inner">Second</div>
* // </div>
* // </div>
* ```
*
* @example <caption>With an existing cheerio instance</caption>
*
* ```js
* const $ = cheerio.load(
* '<span>Span 1</span><strong>Strong</strong><span>Span 2</span>'
* );
* const wrap = $('<div><p><em><b></b></em></p></div>');
* $('span').wrapAll(wrap);
*
* //=> <div>
* // <p>
* // <em>
* // <b>
* // <span>Span 1</span>
* // <span>Span 2</span>
* // </b>
* // </em>
* // </p>
* // </div>
* // <strong>Strong</strong>
* ```
*
* @param wrapper - The DOM structure to wrap around all matched elements in the
* selection.
* @returns The instance itself.
* @see {@link https://api.jquery.com/wrapAll/}
*/
export function wrapAll(wrapper) {
const el = this[0];
if (el) {
const wrap = this._make(typeof wrapper === 'function' ? wrapper.call(el, 0, el) : wrapper).insertBefore(el);
// If html is given as wrapper, wrap may contain text elements
let elInsertLocation;
for (let i = 0; i < wrap.length; i++) {
if (wrap[i].type === 'tag')
elInsertLocation = wrap[i];
}
let j = 0;
/*
* Find the deepest child. Only consider the first tag child of each node
* (ignore text); stop if no children are found.
*/
while (elInsertLocation && j < elInsertLocation.children.length) {
const child = elInsertLocation.children[j];
if (child.type === 'tag') {
elInsertLocation = child;
j = 0;
}
else {
j++;
}
}
if (elInsertLocation)
this._make(elInsertLocation).append(this);
}
return this;
}
/* eslint-disable jsdoc/check-param-names*/
/**
* Insert content next to each element in the set of matched elements.
*
* @category Manipulation
* @example
*
* ```js
* $('.apple').after('<li class="plum">Plum</li>');
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="plum">Plum</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @param content - HTML string, DOM element, array of DOM elements or Cheerio
* to insert after each element in the set of matched elements.
* @returns The instance itself.
* @see {@link https://api.jquery.com/after/}
*/
export function after(...elems) {
const lastIdx = this.length - 1;
return domEach(this, (el, i) => {
const { parent } = el;
if (!hasChildren(el) || !parent) {
return;
}
const siblings = parent.children;
const index = siblings.indexOf(el);
// If not found, move on
/* istanbul ignore next */
if (index < 0)
return;
const domSrc = typeof elems[0] === 'function'
? elems[0].call(el, i, this._render(el.children))
: elems;
const dom = this._makeDomArray(domSrc, i < lastIdx);
// Add element after `this` element
uniqueSplice(siblings, index + 1, 0, dom, parent);
});
}
/* eslint-enable jsdoc/check-param-names*/
/**
* Insert every element in the set of matched elements after the target.
*
* @category Manipulation
* @example
*
* ```js
* $('<li class="plum">Plum</li>').insertAfter('.apple');
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="plum">Plum</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @param target - Element to insert elements after.
* @returns The set of newly inserted elements.
* @see {@link https://api.jquery.com/insertAfter/}
*/
export function insertAfter(target) {
if (typeof target === 'string') {
target = this._make(target);
}
this.remove();
const clones = [];
this._makeDomArray(target).forEach((el) => {
const clonedSelf = this.clone().toArray();
const { parent } = el;
if (!parent) {
return;
}
const siblings = parent.children;
const index = siblings.indexOf(el);
// If not found, move on
/* istanbul ignore next */
if (index < 0)
return;
// Add cloned `this` element(s) after target element
uniqueSplice(siblings, index + 1, 0, clonedSelf, parent);
clones.push(...clonedSelf);
});
return this._make(clones);
}
/* eslint-disable jsdoc/check-param-names*/
/**
* Insert content previous to each element in the set of matched elements.
*
* @category Manipulation
* @example
*
* ```js
* $('.apple').before('<li class="plum">Plum</li>');
* $.html();
* //=> <ul id="fruits">
* // <li class="plum">Plum</li>
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @param content - HTML string, DOM element, array of DOM elements or Cheerio
* to insert before each element in the set of matched elements.
* @returns The instance itself.
* @see {@link https://api.jquery.com/before/}
*/
export function before(...elems) {
const lastIdx = this.length - 1;
return domEach(this, (el, i) => {
const { parent } = el;
if (!hasChildren(el) || !parent) {
return;
}
const siblings = parent.children;
const index = siblings.indexOf(el);
// If not found, move on
/* istanbul ignore next */
if (index < 0)
return;
const domSrc = typeof elems[0] === 'function'
? elems[0].call(el, i, this._render(el.children))
: elems;
const dom = this._makeDomArray(domSrc, i < lastIdx);
// Add element before `el` element
uniqueSplice(siblings, index, 0, dom, parent);
});
}
/* eslint-enable jsdoc/check-param-names*/
/**
* Insert every element in the set of matched elements before the target.
*
* @category Manipulation
* @example
*
* ```js
* $('<li class="plum">Plum</li>').insertBefore('.apple');
* $.html();
* //=> <ul id="fruits">
* // <li class="plum">Plum</li>
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="pear">Pear</li>
* // </ul>
* ```
*
* @param target - Element to insert elements before.
* @returns The set of newly inserted elements.
* @see {@link https://api.jquery.com/insertBefore/}
*/
export function insertBefore(target) {
const targetArr = this._make(target);
this.remove();
const clones = [];
domEach(targetArr, (el) => {
const clonedSelf = this.clone().toArray();
const { parent } = el;
if (!parent) {
return;
}
const siblings = parent.children;
const index = siblings.indexOf(el);
// If not found, move on
/* istanbul ignore next */
if (index < 0)
return;
// Add cloned `this` element(s) after target element
uniqueSplice(siblings, index, 0, clonedSelf, parent);
clones.push(...clonedSelf);
});
return this._make(clones);
}
/**
* Removes the set of matched elements from the DOM and all their children.
* `selector` filters the set of matched elements to be removed.
*
* @category Manipulation
* @example
*
* ```js
* $('.pear').remove();
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // </ul>
* ```
*
* @param selector - Optional selector for elements to remove.
* @returns The instance itself.
* @see {@link https://api.jquery.com/remove/}
*/
export function remove(selector) {
// Filter if we have selector
const elems = selector ? this.filter(selector) : this;
domEach(elems, (el) => {
removeElement(el);
el.prev = el.next = el.parent = null;
});
return this;
}
/**
* Replaces matched elements with `content`.
*
* @category Manipulation
* @example
*
* ```js
* const plum = $('<li class="plum">Plum</li>');
* $('.pear').replaceWith(plum);
* $.html();
* //=> <ul id="fruits">
* // <li class="apple">Apple</li>
* // <li class="orange">Orange</li>
* // <li class="plum">Plum</li>
* // </ul>
* ```
*
* @param content - Replacement for matched elements.
* @returns The instance itself.
* @see {@link https://api.jquery.com/replaceWith/}
*/
export function replaceWith(content) {
return domEach(this, (el, i) => {
const { parent } = el;
if (!parent) {
return;
}
const siblings = parent.children;
const cont = typeof content === 'function' ? content.call(el, i, el) : content;
const dom = this._makeDomArray(cont);
/*
* In the case that `dom` contains nodes that already exist in other
* structures, ensure those nodes are properly removed.
*/
updateDOM(dom, null);
const index = siblings.indexOf(el);
// Completely remove old element
uniqueSplice(siblings, index, 1, dom, parent);
if (!dom.includes(el)) {
el.parent = el.prev = el.next = null;
}
});
}
/**
* Empties an element, removing all its children.
*
* @category Manipulation
* @example
*
* ```js
* $('ul').empty();
* $.html();
* //=> <ul id="fruits"></ul>
* ```
*
* @returns The instance itself.
* @see {@link https://api.jquery.com/empty/}
*/
export function empty() {
return domEach(this, (el) => {
if (!hasChildren(el))
return;
el.children.forEach((child) => {
child.next = child.prev = child.parent = null;
});
el.children.length = 0;
});
}
export function html(str) {
if (str === undefined) {
const el = this[0];
if (!el || !hasChildren(el))
return null;
return this._render(el.children);
}
return domEach(this, (el) => {
if (!hasChildren(el))
return;
el.children.forEach((child) => {
child.next = child.prev = child.parent = null;
});
const content = isCheerio(str)
? str.toArray()
: this._parse(`${str}`, this.options, false, el).children;
updateDOM(content, el);
});
}
/**
* Turns the collection to a string. Alias for `.html()`.
*
* @category Manipulation
* @returns The rendered document.
*/
export function toString() {
return this._render(this);
}
export function text(str) {
// If `str` is undefined, act as a "getter"
if (str === undefined) {
return staticText(this);
}
if (typeof str === 'function') {
// Function support
return domEach(this, (el, i) => this._make(el).text(str.call(el, i, staticText([el]))));
}
// Append text node to each selected elements
return domEach(this, (el) => {
if (!hasChildren(el))
return;
el.children.forEach((child) => {
child.next = child.prev = child.parent = null;
});
const textNode = new Text(`${str}`);
updateDOM(textNode, el);
});
}
/**
* Clone the cheerio object.
*
* @category Manipulation
* @example
*
* ```js
* const moreFruit = $('#fruits').clone();
* ```
*
* @returns The cloned object.
* @see {@link https://api.jquery.com/clone/}
*/
export function clone() {
return this._make(cloneDom(this.get()));
}
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