How to use mapIntoArray method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactChildren.js

Source:ReactChildren.js Github

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...71 第三个参数: 初始为 ''72 第四个参数: child 的 key 值, 初始为 ''73 第五个参数: 回调函数 wrapCallback, 只接收 children 的每一项 child74*/75function mapIntoArray(76 children: ?ReactNodeList,77 array: Array<React$Node>,78 escapedPrefix: string,79 nameSoFar: string,80 callback: (?React$Node) => ?ReactNodeList,81): number {82 const type = typeof children;83 // == 如果 children 是 undefined 或者 boolean, children 则为 null84 if (type === 'undefined' || type === 'boolean') {85 // All of the above are perceived as null.86 children = null;87 }88 // == children 不是数组则会直接唤起 callback89 let invokeCallback = false;90 if (children === null) {91 invokeCallback = true;92 } else {93 switch (type) {94 case 'string':95 case 'number':96 invokeCallback = true;97 break;98 case 'object':99 switch ((children: any).$$typeof) {100 case REACT_ELEMENT_TYPE:101 case REACT_PORTAL_TYPE:102 invokeCallback = true;103 }104 }105 }106 /*// == children 不是数组则会直接唤起 callback107 一、假如 children 为 <div>111111</div> ；调用 React.Children.map(props.children, c => [c, c])108 1. props.children 非数组，进入 invokeCallback109 2. let mappedChild = callback(child), 返回数组（是根据初始的 callback 决定的）110 二、假如 children 为 <div>111111</div> ；调用 React.Children.map(props.children, c => c)111 1. props.children 非数组，进入 invokeCallback112 2. let mappedChild = callback(child), 返回非（是根据初始的 callback 决定的）113 */114 if (invokeCallback) {115 const child = children;116 // == 直接调用 callback, 传入 child117 let mappedChild = callback(child);118 // If it's the only child, treat the name as if it was wrapped in an array119 // so that it's consistent if the number of children grows:120 // == 获取 React Element 的 key 值: element.key121 const childKey =122 nameSoFar === '' ? SEPARATOR + getElementKey(child, 0) : nameSoFar;123 124 if (Array.isArray(mappedChild)) {125 // == mappedChild 为 Array126 let escapedChildKey = '';127 if (childKey != null) {128 escapedChildKey = escapeUserProvidedKey(childKey) + '/';129 }130 // == 递归调用: 反正最终结果的回调是展平数组 c => c131 // == 在下次进入 mapIntoArray 函数的时候 会进入 invokeCallback 为 false 的逻辑132 mapIntoArray(mappedChild, array, escapedChildKey, '', c => c);133 } else if (mappedChild != null) {134 // == mappedChild 不为 Array，但不为 null135 if (isValidElement(mappedChild)) {136 // == mappedChild 是合理的 React Element137 mappedChild = cloneAndReplaceKey(138 mappedChild,139 // Keep both the (mapped) and old keys if they differ, just as140 // traverseAllChildren used to do for objects as children141 escapedPrefix +142 // $FlowFixMe Flow incorrectly thinks React.Portal doesn't have a key143 (mappedChild.key && (!child || child.key !== mappedChild.key)144 ? // $FlowFixMe Flow incorrectly thinks existing element's key can be a number145 escapeUserProvidedKey('' + mappedChild.key) + '/'146 : '') +147 childKey,148 );149 }150 // == array 将 mappedChild 存入151 array.push(mappedChild);152 }153 // == mappedChild 为 null154 return 1;155 }156 let child;157 let nextName;158 let subtreeCount = 0; // Count of children found in the current subtree.159 const nextNamePrefix =160 nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR;161 /*// == children 是数组162 一、假如 children 为 [<div>111111</div>, <div>22222</div>]；调用 React.Children.map(props.children, c => c)163 1. props.children 是数组，进入 !invokeCallback164 2. for 循环 children 每一项都 mapIntoArray165 3. 则子 child 在下一次进入 mapIntoArray 则进入 invokeCallback 逻辑166 二、假如 children 不是数组，是遍历器函数。一样的遍历每一项167 */168 if (Array.isArray(children)) {169 // == chilren 每一项都调用 mapIntoArray170 for (let i = 0; i < children.length; i++) {171 child = children[i];172 nextName = nextNamePrefix + getElementKey(child, i);173 subtreeCount += mapIntoArray(174 child,175 array,176 escapedPrefix,177 nextName,178 callback,179 );180 }181 } else {182 /* iteratorFn 的值为: children[Symbol.iterator] 或 children[@@iterator]， 是一个遍历器函数183 某对象的 Symbol.iterator 属性为遍历器函数，则 该对象 变为遍历器对象，具有遍历器接口。184 例：function* gen() {} let g = gen(); // g 为遍历器对象185 g[Symbol.iterator] === gen186 g[Symbol.iterator]() === g187 */188 const iteratorFn = getIteratorFn(children);189 if (typeof iteratorFn === 'function') {190 const iterableChildren: Iterable<React$Node> & {191 entries: any,192 } = (children: any);193 if (__DEV__) {194 // Warn about using Maps as children195 if (iteratorFn === iterableChildren.entries) {196 if (!didWarnAboutMaps) {197 console.warn(198 'Using Maps as children is not supported. ' +199 'Use an array of keyed ReactElements instead.',200 );201 }202 didWarnAboutMaps = true;203 }204 }205 // == 遍历器对象，遍历遍历器对象: 每一项都调用 mapIntoArray206 const iterator = iteratorFn.call(iterableChildren);207 let step;208 let ii = 0;209 while (!(step = iterator.next()).done) {210 child = step.value;211 nextName = nextNamePrefix + getElementKey(child, ii++);212 subtreeCount += mapIntoArray(213 child,214 array,215 escapedPrefix,216 nextName,217 callback,218 );219 }220 } else if (type === 'object') {221 // == typeof children 是一个 object: 报错222 const childrenString = '' + (children: any);223 invariant(224 false,225 'Objects are not valid as a React child (found: %s). ' +226 'If you meant to render a collection of children, use an array ' +227 'instead.',228 childrenString === '[object Object]'229 ? 'object with keys {' + Object.keys((children: any)).join(', ') + '}'230 : childrenString,231 );232 }233 }234 // == 返回子树的数量235 return subtreeCount;236}237type MapFunc = (child: ?React$Node) => ?ReactNodeList;238/**239 * Maps children that are typically specified as `props.children`.240 *241 * See https://reactjs.org/docs/react-api.html#reactchildrenmap242 *243 * The provided mapFunction(child, index) will be called for each244 * leaf child.245 *246 * @param {?*} children Children tree container.247 * @param {function(*, int)} func The map function.248 * @param {*} context Context for mapFunction.249 * @return {object} Object containing the ordered map of results.250 */251// == 第一个参数: props.children252// == 第二个参数: 回调函数, 接收 children 的每一项 child253// == 第三个参数: context，不传则为 null 嘛254// == 返回新的 children255function mapChildren(256 children: ?ReactNodeList,257 func: MapFunc,258 context: mixed,259): ?Array<React$Node> {260 // == children 为 null 或 undefined 直接返回261 if (children == null) {262 return children;263 }264 const result = [];265 let count = 0;266 // == children 的每一项应用 func 函数，传入 child 和 index267 mapIntoArray(children, result, '', '', function(child) {268 return func.call(context, child, count++);269 });270 // == 返回累计的结果 result271 return result;272}273/**274 * Count the number of children that are typically specified as275 * `props.children`.276 *277 * See https://reactjs.org/docs/react-api.html#reactchildrencount278 *279 * @param {?*} children Children tree container.280 * @return {number} The number of children.281 */...

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index.js

Source:index.js Github

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...40 };41 async componentDidMount() {42 this.setState({43 genres: bookGenres,44 maxID: this.mapIntoArray(booksBackupAPI).length + 145 });46 const result = await getBooksCatalog();47 try {48 this.setState({49 isLoaded: true,50 books: this.mapIntoArray(result.catalog),51 originalBooks: this.mapIntoArray(result.catalog)52 });53 } catch (error) {54 this.setState({55 isLoaded: true,56 books: this.mapIntoArray(booksBackupAPI),57 originalBooks: this.mapIntoArray(booksBackupAPI)58 });59 }60 }61 mapIntoArray(result) {62 const array = [];63 Object.keys(result).filter(index => array.push(result[index]));64 return array;65 }66 handleFilterChange(genre) {67 const { filtersChecked, originalBooks } = this.state;68 if (!filtersChecked.includes(genre)) {69 filtersChecked.push(genre);70 } else {71 const index = filtersChecked.indexOf(genre);72 filtersChecked.splice(index, 1);73 }74 if (filtersChecked.length !== 0) {75 const found = originalBooks.filter(book =>...

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output.js

Source:output.js Github

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1function mapIntoArray(children, array, escapedPrefix, nameSoFar, callback) {2 var type = typeof children;3 ("undefined" === type || "boolean" === type) && (children = null);4 var invokeCallback = !1;5 if (null === children) invokeCallback = !0;6 else switch(type){7 case "string":8 case "number":9 invokeCallback = !0;10 break;11 case "object":12 switch(children.$$typeof){13 case REACT_ELEMENT_TYPE:14 case REACT_PORTAL_TYPE:15 invokeCallback = !0;16 }17 }18 if (invokeCallback) {19 var _child = children, mappedChild = callback(_child), childKey = "" === nameSoFar ? "." + getElementKey(_child, 0) : nameSoFar;20 if (Array.isArray(mappedChild)) {21 var escapedChildKey = "";22 null != childKey && (escapedChildKey = escapeUserProvidedKey(childKey) + "/"), mapIntoArray(mappedChild, array, escapedChildKey, "", function(c) {23 return c;24 });25 } else null != mappedChild && (isValidElement(mappedChild) && (mappedChild = cloneAndReplaceKey(mappedChild, escapedPrefix + (mappedChild.key && (!_child || _child.key !== mappedChild.key) ? escapeUserProvidedKey("" + mappedChild.key) + "/" : "") + childKey)), array.push(mappedChild));26 return 1;27 }28 var subtreeCount = 0, nextNamePrefix = "" === nameSoFar ? "." : nameSoFar + SUBSEPARATOR;29 if (Array.isArray(children)) for(var i = 0; i < children.length; i++)nextName = nextNamePrefix + getElementKey(child = children[i], i), subtreeCount += mapIntoArray(child, array, escapedPrefix, nextName, callback);30 else {31 var iteratorFn = getIteratorFn(children);32 if ("function" == typeof iteratorFn) {33 var child, nextName, step, iterableChildren = children;34 iteratorFn === iterableChildren.entries && (didWarnAboutMaps || warn("Using Maps as children is not supported. Use an array of keyed ReactElements instead."), didWarnAboutMaps = !0);35 for(var iterator = iteratorFn.call(iterableChildren), ii = 0; !(step = iterator.next()).done;)nextName = nextNamePrefix + getElementKey(child = step.value, ii++), subtreeCount += mapIntoArray(child, array, escapedPrefix, nextName, callback);36 } else if ("object" === type) {37 var childrenString = "" + children;38 throw Error("Objects are not valid as a React child (found: " + ("[object Object]" === childrenString ? "object with keys {" + Object.keys(children).join(", ") + "}" : childrenString) + "). If you meant to render a collection of children, use an array instead.");39 }40 }41 return subtreeCount;...

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Using AI Code Generation

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1const { mapIntoArray } = require('playwright/lib/utils/utils');2const { Page } = require('playwright/lib/server/page');3const { ElementHandle } = require('playwright/lib/server/dom');4const { Frame } = require('playwright/lib/server/frame');5async function main() {6 const page = new Page(null, null, null);7 await page.setContent(`<div>Hello World</div>`);8 const frame = page.mainFrame();9 const element = await frame.$('div');10 const array = await mapIntoArray(element, element => element.textContent);11 console.log(array);12}13main();14const { mapIntoArray } = require('playwright/lib/utils/utils');15const { Page } = require('playwright/lib/server/page');16const { ElementHandle } = require('playwright/lib/server/dom');17const { Frame } = require('playwright/lib/server/frame');18async function main() {19 const page = new Page(null, null, null);20 await page.setContent(`<div>Hello World</div>`);21 const frame = page.mainFrame();22 const element = await frame.$('div');23 const array = await mapIntoArray(element, element => element.textContent);24 console.log(array);25}26main();27const { mapIntoArray } = require('playwright/lib/utils/utils');28const { Page } = require('playwright/lib/server/page');29const { ElementHandle } = require('playwright/lib/server/dom');30const { Frame } = require('playwright/lib/server/frame');31async function main() {32 const page = new Page(null, null, null);33 await page.setContent(`<div>Hello World</div>`);34 const frame = page.mainFrame();35 const element = await frame.$('div');36 const array = await mapIntoArray(element, element => element.textContent);37 console.log(array);38}39main();40const { mapIntoArray } = require('playwright/lib/utils/utils

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Using AI Code Generation

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1const { mapIntoArray } = require('playwright/lib/utils/utils');2const { mapIntoArray } = require('playwright/lib/utils/utils');3const obj = {4}5const arr = mapIntoArray(obj, (value, key) => {6 return {7 }8});9console.log(arr);10const { mapIntoArray } = require('playwright/lib/utils/utils');11const { mapIntoArray } = require('playwright/lib/utils/utils');12const obj = {13}14const arr = mapIntoArray(obj, (value, key) => {15 return {16 }17});18console.log(arr);19const { mapIntoArray } = require('playwright/lib/utils/utils');20const { mapIntoArray } = require('playwright/lib/utils/utils');21const obj = {22}23const arr = mapIntoArray(obj, (value, key) => {24 return {25 }26});27console.log(arr);28const { mapIntoArray

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Using AI Code Generation

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1const { mapIntoArray } = require('@playwright/test/lib/utils/utils');2const assert = require('assert');3const array = [1, 2, 3, 4, 5];4const newArray = mapIntoArray(array, (item) => item * 2);5assert.deepStrictEqual(newArray, [2, 4, 6, 8, 10]);6assert.deepStrictEqual(array, [1, 2, 3, 4, 5]);7console.log('test passed');8import { mapIntoArray } from '@playwright/test/lib/utils/utils';9import assert from 'assert';10const array = [1, 2, 3, 4, 5];11const newArray = mapIntoArray(array, (item) => item * 2);12assert.deepStrictEqual(newArray, [2, 4, 6, 8, 10]);13assert.deepStrictEqual(array, [1, 2, 3, 4, 5]);14console.log('test passed');15const assert = require('assert');16const { test, expect } = require('@playwright/test');17test('basic test', async ({ page }) => {18 const title = page.locator('text=Playwright');19 await expect(title).toBeVisible();20 const text = await page.textContent('css=div.home-description');21 assert(/Node\.js library/.test(text));22});

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Using AI Code Generation

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1const { mapIntoArray } = require('playwright/lib/utils/utils');2const array = [1, 2, 3, 4];3const newArray = mapIntoArray(array, (value, index) => {4 return value + index;5});6console.log(newArray);

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