How to use isPureComponent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

index.js

Source:index.js Github

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1#!/​usr/​bin/​env node2'use strict';3const program = require('commander');4const spawn = require('cross-spawn');5const chalk = require('chalk');6const path = require('path');7const fs = require('fs-extra');8const log = console.log;9program10 /​/​ 定义 g 命令11 .command('g')12 /​/​ 命令 g 的描述13 .description('Generate a component')14 /​/​ 定义 -c 选项，接受一个必选参数 componentName：组件名称15 .option('-c, --component-name <componentName>', 'The name of the component')16 /​/​ 定义 --no-folder 选项：表示当使用该选项时，组件不会被文件夹包裹17 .option('-n, --no-folder', 'Whether the component have not it is own folder')18 /​/​ 定义 -p 选项：表示当使用该选项时，组件为继承自 React.PureComponent 的类组件19 .option(20 '-p, --pure-component',21 'Whether the component is a extend from PureComponent'22 )23 /​/​ 定义 -s 选项：表示当使用该选项时，组件为无状态的函数组件24 .option(25 '-s, --stateless',26 'Whether the component is a extend from PureComponent'27 )28 /​/​ 定义执行 g 命令后调用的回调函数29 .action((cmd, opt) => {30 /​/​ 当 -c 选项没有传参数进来时，报错、退出31 if (!cmd.componentName) {32 log(chalk.red('error: missing required argument `componentName`'));33 process.exit(1);34 }35 const { argv } = process;36 /​/​ 创建组件37 createComponent(38 argv[argv.length - 1],39 !hasFilter('-n', argv),40 hasFilter('-p', argv),41 hasFilter('-s', argv)42 );43 });44program.parse(process.argv);45/​/​ 命令行对值46function hasFilter(str, arr) {47 return arr.filter(item => { return item === str }).length48}49/​**50 * 创建组件51 * @param {string} componentName 组件名称52 * @param {boolean} hasFolder 是否含有文件夹53 * @param {boolean} isStateless 是否是无状态组件54 * @param {boolean} isPureComponent 是否是纯组件55 */​56function createComponent (57 componentName,58 hasFolder,59 isStateless = false,60 isPureComponent = false61) {62 let dirPath = path.join(process.cwd());63 /​/​ 组件在文件夹中64 if (hasFolder) {65 dirPath = path.join(dirPath, componentName);66 const result = fs.ensureDirSync(dirPath);67 /​/​ 目录已存在68 if (!result) {69 log(chalk.red(`${dirPath} already exists`));70 process.exit(1);71 }72 const indexJs = getIndexJs(componentName);73 const less = '';74 fs.writeFileSync(path.join(dirPath, `config.js`), indexJs);75 fs.writeFileSync(path.join(dirPath, `style.less`), less);76 }77 let component;78 /​/​ 无状态组件79 if (isStateless) {80 component = getStatelessComponent(componentName, hasFolder);81 } else {82 /​/​ 有状态组件83 component = getClassComponent(84 componentName,85 isPureComponent ? 'React.PureComponent' : 'React.Component',86 hasFolder87 );88 }89 90 fs.writeFileSync(path.join(dirPath, `${componentName}.jsx`), component);91 log(92 chalk.green(`The ${componentName} component was successfully generated!`)93 );94 process.exit(1);95}96 97/​**98 * 获取类组件字符串99 * @param {string} componentName 组件名称100 * @param {string} extendFrom 继承自：'React.Component' | 'React.PureComponent'101 * @param {boolean} hasFolder 组件是否在文件夹中（在文件夹中的话，就会自动加载 less 文件）102 */​103function getClassComponent(componentName, extendFrom, hasFolder) {104 return `import React, {Fragment} from 'react';105 import ReactDOM from 'react-dom';106 import zhCN from 'antd/​lib/​locale-provider/​zh_CN';107 /​/​ import commerServer from './​server';108 import Navbar from 'components/​navbar';109 import moment from 'moment';110 import 'moment/​locale/​zh-cn';111 import './​style.less';112 moment.locale('zh-cn');113 114 class ${componentName} extends React.${extendFrom ? 'Component' : 'PureComponent'} {115 constructor(props) {116 super(props);117 this.state = {118 loading: false119 };120 }121 122 componentDidMount() {123 this.query()124 }125 /​/​ 获取数据126 query = async ()=>{127 this.setState({loading: true })128 /​/​ const param = { };129 /​/​ const res = await commerServer.nnn({...param});130 this.setState({131 loading: false 132 })133 }134 render() {135 let { } = this.state;136 137 return (138 <LocaleProvider locale={zhCN}>139 <div className='combination_list'>140 <Navbar>组合销售</​Navbar>141 <div className='border_layer'>142 </​div>143 </​div>144 </​LocaleProvider>145 );146 }147 }148 149 const pageContent = document.getElementById('J_Page');150 if (pageContent) {151 ReactDOM.render(<${componentName} /​>, pageContent);152 }153 `;154}155 156/​**157 * 获取无状态组件字符串158 * @param {string} componentName 组件名称159 * @param {boolean} hasFolder 组件是否在文件夹中（在文件夹中的话，就会自动加载 less 文件）160 */​161function getStatelessComponent(componentName, hasFolder) {162 return '省略...';163}164 165/​**166 * 获取 index.js 文件内容167 * @param {string} componentName 组件名称168 */​169function getIndexJs(componentName) {170 return `import ${componentName} from './​${componentName}';171export default ${componentName};172`;...

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instance-method.test.js

Source:instance-method.test.js Github

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1/​* eslint-env jest */​2import React from 'react';3import { createMounter, ensureNoWarnings } from './​helper';4import createProxy from '../​../​src/​proxy';5const createFixtures = () => ({6 modern: {7 shouldWarnOnBind: false,8 Counter1x: class Counter1x extends React.Component {9 constructor(props) {10 super(props);11 this.state = { counter: 0 };12 }13 increment() {14 this.setState({15 counter: this.state.counter + 1,16 });17 }18 render() {19 return <span>{this.state.counter}</​span>;20 }21 },22 Counter10x: class Counter10x extends React.Component {23 constructor(props) {24 super(props);25 this.state = { counter: 0 };26 }27 increment() {28 this.setState({29 counter: this.state.counter + 10,30 });31 }32 render() {33 return <span>{this.state.counter}</​span>;34 }35 },36 Counter100x: class Counter100x extends React.Component {37 constructor(props) {38 super(props);39 this.state = { counter: 0 };40 }41 increment() {42 this.setState({43 counter: this.state.counter + 100,44 });45 }46 render() {47 return <span>{this.state.counter}</​span>;48 }49 },50 CounterWithoutIncrementMethod: class CounterWithoutIncrementMethod extends React.Component {51 constructor(props) {52 super(props);53 this.state = { counter: 0 };54 }55 render() {56 return <span>{this.state.counter}</​span>;57 }58 },59 NotPureComponent: class NotPureComponent extends React.Component {60 shouldComponentUpdate() {61 return true;62 }63 render() {64 return <span>Component</​span>;65 }66 },67 IsPureComponent: class IsPureComponent extends React.PureComponent {68 render() {69 return <span>PureComponent</​span>;70 }71 },72 },73});74describe('instance method', () => {75 const { getWarnSpy } = ensureNoWarnings();76 const { mount } = createMounter();77 Object.keys(createFixtures()).forEach(type => {78 describe(type, () => {79 it('gets added', () => {80 const { Counter1x, CounterWithoutIncrementMethod } = createFixtures()[type];81 const proxy = createProxy(CounterWithoutIncrementMethod);82 const Proxy = proxy.get();83 const wrapper = mount(<Proxy /​>);84 expect(wrapper.text()).toEqual('0');85 proxy.update(Counter1x);86 wrapper.instance().increment();87 expect(wrapper.text()).toEqual('1');88 });89 it('gets replaced', () => {90 const { Counter1x, Counter10x, Counter100x } = createFixtures()[type];91 const proxy = createProxy(Counter1x);92 const Proxy = proxy.get();93 const wrapper = mount(<Proxy /​>);94 expect(wrapper.text()).toEqual('0');95 wrapper.instance().increment();96 expect(wrapper.text()).toEqual('1');97 proxy.update(Counter10x);98 wrapper.instance().increment();99 mount(<Proxy /​>);100 expect(wrapper.text()).toEqual('11');101 proxy.update(Counter100x);102 wrapper.instance().increment();103 mount(<Proxy /​>);104 expect(wrapper.text()).toEqual('111');105 });106 it('removes shouldComponentUpdate', () => {107 const { IsPureComponent, NotPureComponent } = createFixtures()[type];108 const proxy = createProxy(NotPureComponent);109 const Proxy = proxy.get();110 const wrapper = mount(<Proxy /​>);111 expect(wrapper.text()).toEqual('Component');112 expect(wrapper.instance()).toHaveProperty('shouldComponentUpdate');113 proxy.update(IsPureComponent);114 wrapper.instance().forceUpdate();115 mount(<Proxy /​>);116 expect(wrapper.text()).toEqual('PureComponent');117 expect(wrapper.instance()).not.toHaveProperty('shouldComponentUpdate');118 });119 it('cant handle bound methods', () => {120 const { Counter1x, Counter10x, shouldWarnOnBind } = createFixtures()[type];121 const proxy = createProxy(Counter1x);122 const Proxy = proxy.get();123 const wrapper = mount(<Proxy /​>);124 const instance = wrapper.instance();125 getWarnSpy().mockReset();126 const localWarnSpy = jest.spyOn(console, 'warn');127 instance.increment = instance.increment.bind(instance);128 expect(localWarnSpy).toHaveBeenCalledTimes(shouldWarnOnBind ? 1 : 0);129 expect(wrapper.text()).toEqual('0');130 instance.increment();131 expect(wrapper.text()).toEqual('1');132 proxy.update(Counter10x);133 instance.increment();134 mount(<Proxy /​>);135 expect(wrapper.text()).toEqual('2'); /​/​ not 11136 });137 });138 });139 it('passes methods props thought', () => {140 const injectedMethod = (a, b) => this[24 + a + b];141 injectedMethod.staticProp = 'magic';142 class App extends React.Component {143 method() {144 return 42;145 }146 }147 App.prototype.injectedMethod = injectedMethod;148 const app1 = new App();149 expect(app1.injectedMethod).toBe(injectedMethod);150 expect(app1.injectedMethod.staticProp).toBe('magic');151 expect(String(app1.injectedMethod)).toBe(String(injectedMethod));152 const Proxy = createProxy(App).get();153 const app2 = new Proxy();154 expect(app2.injectedMethod).not.toBe(injectedMethod);155 expect(app2.injectedMethod.staticProp).toBe('magic');156 expect(app2.injectedMethod.length).toBe(2);157 expect(String(app2.injectedMethod)).toBe(String(injectedMethod));158 });...

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RenderTest.js

Source:RenderTest.js Github

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...37 }38 console.groupEnd();39 }40}41function isPureComponent(WrappedComponent) {42 return !!(WrappedComponent.prototype && WrappedComponent.prototype.isPureReactComponent);43}44const RerenderTest = (WrappedComponent, { verbose }) => {45 const Parent = isPureComponent(WrappedComponent) ? PureComponent : Component;46 return class Container extends Parent {47 componentDidUpdate(prevProps, prevState) {48 deepDiff(49 { props: prevProps, state: prevState },50 { props: this.props, state: this.state },51 WrappedComponent.name, verbose52 );53 }54 render() {55 return <WrappedComponent {...this.props} /​>;56 }57 };58}59export default RerenderTest;

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PureComponentExp.js

Source:PureComponentExp.js Github

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1import React, { Component, PureComponent, useState } from 'react';2class IsPureComponent extends PureComponent {3 render() {4 return (5 <div>6 <div>-----</​div>7 <div>PureComponent render: {this.props.state}</​div>8 <div>Render be Called: {Math.random()}</​div>9 </​div>10 );11 }12}13class NonComponent extends Component {14 render() {15 return (16 <div>17 <div>-----</​div>18 <div>Non PureComponent render: {this.props.state}</​div>19 <div>Render be Called: {Math.random()}</​div>20 </​div>21 );22 }23}24const Wrapper = () => {25 const [state, setState] = useState(0);26 const [value, setValue] = useState(0);27 return <div>28 <div>click the followig buttons will change Component1 and Component2 props</​div>29 <button onClick={() => setValue(Math.random())}>click to change state but not pass props (Component will be rendered, but not pure component)</​button>30 <button onClick={() => setState(Math.random())}>click to change state and pass props to two components</​button>31 <div>Current passed props value = {state}</​div>32 <div>Current NOT passed props value = {value}</​div>33 <IsPureComponent state={state}/​>34 <NonComponent state={state}/​>35 </​div>36}...

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isPureComponent.spec.js

Source:isPureComponent.spec.js Github

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2import React from 'react'3import isPureComponent from '../​src/​isPureComponent'4test('Simple function - pure', function () {5 const Comp = function (props) { return <div /​> }6 expect(isPureComponent(Comp)).toBeTruthy()7})8test('Arrow function - pure', function () {9 const Comp = (props) => { return <div /​> }10 expect(isPureComponent(Comp)).toBeTruthy()11})12test('Subclass of React.PureComponent - pure', function () {13 class Comp extends React.PureComponent {14 render () {15 return <div /​>16 }17 }18 expect(isPureComponent(Comp)).toBeTruthy()19})20test('Subclass of React.Component - not pure', function () {21 class Comp extends React.Component {22 render () {23 return <div /​>24 }25 }26 expect(isPureComponent(Comp)).toBeFalsy()27})28test('Host component - not pure', function () {29 expect(isPureComponent('div')).toBeFalsy()...

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PureComponent.js

Source:PureComponent.js Github

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1import Component from './​Component';2import { shallowEqual } from './​shared';3class PureComponent extends Component {4 isPureComponent = true;5 shouldComponentUpdate (nextProps, nextState) {6 return !shallowEqual(this.props, nextProps) || !shallowEqual(this.state, nextState);7 }8}...

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pure-component.js

Source:pure-component.js Github

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1import Component from './​component'2import shallowEqual from './​shallow-equal'3class PureComponent extends Component {4 isPureComponent = true5 shouldComponentUpdate (nextProps, nextState) {6 return !shallowEqual(this.props, nextProps) || !shallowEqual(this.state, nextState)7 }8}...

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isPureComponent.js

Source:isPureComponent.js Github

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1function isPureComponent (comp) {2 if (typeof comp === 'string') {3 return false4 }5 const p = comp.prototype6 return p.isPureReactComponent || !p.setState7}...

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Using AI Code Generation

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1const { isPureComponent } = require('playwright/​lib/​server/​frames');2const { Page } = require('playwright/​lib/​server/​page');3const { Frame } = require('playwright/​lib/​server/​frame');4const { ElementHandle } = require('playwright/​lib/​server/​dom');5const { isPureComponent } = require('playwright/​lib/​server/​frames');6const { Page } = require('playwright/​lib/​server/​page');7const { Frame } = require('playwright/​lib/​server/​frame');8const { ElementHandle } = require('playwright/​lib/​server/​dom');9const { isPureComponent } = require('playwright/​lib/​server/​frames');10const { Page } = require('playwright/​lib/​server/​page');11const { Frame } = require('playwright/​lib/​server/​frame');12const { ElementHandle } = require('playwright/​lib/​server/​dom');13const { isPureComponent } = require('playwright/​lib/​server/​frames');14const { Page } = require('playwright/​lib/​server/​page');15const { Frame } = require('playwright/​lib/​server/​frame');16const { ElementHandle } = require('playwright/​lib/​server/​dom');17const { isPureComponent } = require('playwright/​lib/​server/​frames');18const { Page } = require('playwright/​lib/​server/​page');19const { Frame } = require('playwright/​lib/​server/​frame');20const { ElementHandle } = require('playwright/​lib/​server/​dom');21const { isPureComponent } = require('playwright/​lib/​server/​frames');22const { Page } = require('playwright/​lib/​server/​page');23const { Frame } = require('playwright/​lib/​server/​frame');24const { ElementHandle } = require('playwright/​lib/​server/​dom');25const { isPureComponent } = require('playwright/​lib/​server/​frames');26const { Page } = require('playwright/​lib/​server/​page');27const { Frame } = require('playwright/​lib/​server/​frame');28const { ElementHandle } = require('playwright/​lib/​server/​dom');29const { isPureComponent } =

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Using AI Code Generation

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1const { isPureComponent } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement');2const { Page } = require('playwright');3const { chromium } = require('playwright');4(async () => {5 const browser = await chromium.launch();6 const context = await browser.newContext();7 const page = await context.newPage();8 const pure = await isPureComponent(page, 'div');9 console.log(pure);10 await browser.close();11})();

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Using AI Code Generation

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1const { isPureComponent } = require('@playwright/​test/​lib/​utils');2const { Page } = require('@playwright/​test/​lib/​page');3const { expect } = require('@playwright/​test');4describe('test', () => {5 it('test', async () => {6 const page = new Page();7 const isPureComponentResult = isPureComponent(page);8 expect(isPureComponentResult).toBe(false);9 });10});

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Using AI Code Generation

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1const { isPureComponent } = require('playwright/​lib/​server/​frames');2const { parseSelector } = require('playwright/​lib/​server/​common/​selectors');3const { parseSelectorV2 } = require('playwright/​lib/​server/​common/​selectors2');4const selector = parseSelector('text=foo', 'css');5const selectorV2 = parseSelectorV2('text=foo', 'css');6console.log(isPureComponent(selector));7console.log(isPureComponent(selectorV2));8const selectorEngine = await page.selectorEngine();9console.log(selectorEngine.isPureComponent(selector));10const selectorEngine = await page.selectorEngine();11console.log(selectorEngine.isPureComponent(selector));

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Using AI Code Generation

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1const { isPureComponent } = require('playwright/​lib/​server/​domPatchers/​PureComponent');2const { parseScript } = require('playwright/​lib/​server/​common/​utils');3const { parse } = require('playwright/​lib/​server/​common/​inspectorUtils');4const { parseExpression } = require('playwright/​lib/​server/​common/​utils');5const code = "const MyComponent = (props) => { return <div>{props.name}</​div> }";6const script = parseScript(code);7const node = script.body[0].declarations[0].init;8const isPure = isPureComponent(node);9console.log(isPure);10{11 "dependencies": {12 }13}14[Apache 2.0](LICENSE)

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