Best JavaScript code snippet using puppeteer
Coverage.js
Source:Coverage.js
...130 continue;131 const flattenRanges = [];132 for (const func of entry.functions)133 flattenRanges.push(...func.ranges);134 const ranges = convertToDisjointRanges(flattenRanges);135 coverage.push({url, ranges, text});136 }137 return coverage;138 }139}140class CSSCoverage {141 /**142 * @param {!Puppeteer.CDPSession} client143 */144 constructor(client) {145 this._client = client;146 this._enabled = false;147 this._stylesheetURLs = new Map();148 this._stylesheetSources = new Map();149 this._eventListeners = [];150 this._resetOnNavigation = false;151 }152 /**153 * @param {!Object} options154 */155 async start(options = {}) {156 console.assert(!this._enabled, 'CSSCoverage is already enabled');157 this._resetOnNavigation = options.resetOnNavigation === undefined ? true : !!options.resetOnNavigation;158 this._enabled = true;159 this._stylesheetURLs.clear();160 this._stylesheetSources.clear();161 this._eventListeners = [162 helper.addEventListener(this._client, 'CSS.styleSheetAdded', this._onStyleSheet.bind(this)),163 helper.addEventListener(this._client, 'Runtime.executionContextsCleared', this._onExecutionContextsCleared.bind(this)),164 ];165 await Promise.all([166 this._client.send('DOM.enable'),167 this._client.send('CSS.enable'),168 this._client.send('CSS.startRuleUsageTracking'),169 ]);170 }171 _onExecutionContextsCleared() {172 if (!this._resetOnNavigation)173 return;174 this._stylesheetURLs.clear();175 this._stylesheetSources.clear();176 }177 /**178 * @param {!Object} event179 */180 async _onStyleSheet(event) {181 const header = event.header;182 // Ignore anonymous scripts183 if (!header.sourceURL)184 return;185 try {186 const response = await this._client.send('CSS.getStyleSheetText', {styleSheetId: header.styleSheetId});187 this._stylesheetURLs.set(header.styleSheetId, header.sourceURL);188 this._stylesheetSources.set(header.styleSheetId, response.text);189 } catch (e) {190 // This might happen if the page has already navigated away.191 debugError(e);192 }193 }194 /**195 * @return {!Promise<!Array<!CoverageEntry>>}196 */197 async stop() {198 console.assert(this._enabled, 'CSSCoverage is not enabled');199 this._enabled = false;200 const [ruleTrackingResponse] = await Promise.all([201 this._client.send('CSS.stopRuleUsageTracking'),202 this._client.send('CSS.disable'),203 this._client.send('DOM.disable'),204 ]);205 helper.removeEventListeners(this._eventListeners);206 // aggregate by styleSheetId207 const styleSheetIdToCoverage = new Map();208 for (const entry of ruleTrackingResponse.ruleUsage) {209 let ranges = styleSheetIdToCoverage.get(entry.styleSheetId);210 if (!ranges) {211 ranges = [];212 styleSheetIdToCoverage.set(entry.styleSheetId, ranges);213 }214 ranges.push({215 startOffset: entry.startOffset,216 endOffset: entry.endOffset,217 count: entry.used ? 1 : 0,218 });219 }220 const coverage = [];221 for (const styleSheetId of this._stylesheetURLs.keys()) {222 const url = this._stylesheetURLs.get(styleSheetId);223 const text = this._stylesheetSources.get(styleSheetId);224 const ranges = convertToDisjointRanges(styleSheetIdToCoverage.get(styleSheetId) || []);225 coverage.push({url, ranges, text});226 }227 return coverage;228 }229}230/**231 * @param {!Array<!{startOffset:number, endOffset:number, count:number}>} nestedRanges232 * @return {!Array<!{start:number, end:number}>}233 */234function convertToDisjointRanges(nestedRanges) {235 const points = [];236 for (const range of nestedRanges) {237 points.push({ offset: range.startOffset, type: 0, range });238 points.push({ offset: range.endOffset, type: 1, range });239 }240 // Sort points to form a valid parenthesis sequence.241 points.sort((a, b) => {242 // Sort with increasing offsets.243 if (a.offset !== b.offset)244 return a.offset - b.offset;245 // All "end" points should go before "start" points.246 if (a.type !== b.type)247 return b.type - a.type;248 const aLength = a.range.endOffset - a.range.startOffset;...
cssHandler.js
Source:cssHandler.js
...31 this._stylesheetURLs.clear();32 this._stylesheetSources.clear();33 });34 }35 async convertToDisjointRanges(nestedRanges) {36 const points = [];37 for (const range of nestedRanges) {38 points.push({ offset: range.startOffset, type: 0, range });39 points.push({ offset: range.endOffset, type: 1, range });40 }41 // Sort points to form a valid parenthesis sequence.42 points.sort((a, b) => {43 // Sort with increasing offsets.44 if (a.offset !== b.offset) return a.offset - b.offset;45 // All "end" points should go before "start" points.46 if (a.type !== b.type) return b.type - a.type;47 const aLength = a.range.endOffset - a.range.startOffset;48 const bLength = b.range.endOffset - b.range.startOffset;49 // For two "start" points, the one with longer range goes first.50 if (a.type === 0) return bLength - aLength;51 // For two "end" points, the one with shorter range goes first.52 return aLength - bLength;53 });54 const hitCountStack = [];55 const results = [];56 let lastOffset = 0;57 // Run scanning line to intersect all ranges.58 for (const point of points) {59 if (60 hitCountStack.length &&61 lastOffset < point.offset &&62 hitCountStack[hitCountStack.length - 1] > 063 ) {64 const lastResult = results.length ? results[results.length - 1] : null;65 if (lastResult && lastResult.end === lastOffset)66 lastResult.end = point.offset;67 else results.push({ start: lastOffset, end: point.offset });68 }69 lastOffset = point.offset;70 if (point.type === 0) hitCountStack.push(point.range.count);71 else hitCountStack.pop();72 }73 // Filter out empty ranges.74 return results.filter(range => range.end - range.start > 1);75 }76 async stopCssTracking() {77 assert(this._enabled, 'CSS Coverage has not started!!');78 let cssResults = await this.css.stopRuleUsageTracking();79 await Promise.all([this.css.disable()]);80 this._enabled = false;81 const styleSheetIdToCoverage = new Map();82 for (const entry of cssResults.ruleUsage) {83 let ranges = styleSheetIdToCoverage.get(entry.styleSheetId);84 if (!ranges) {85 ranges = [];86 styleSheetIdToCoverage.set(entry.styleSheetId, ranges);87 }88 ranges.push({89 startOffset: entry.startOffset,90 endOffset: entry.endOffset,91 count: entry.used ? 1 : 092 });93 }94 const cssCoverage = [];95 for (const styleSheetId of this._stylesheetURLs.keys()) {96 const url = this._stylesheetURLs.get(styleSheetId);97 const text = this._stylesheetSources.get(styleSheetId);98 const ranges = await this.convertToDisjointRanges(99 styleSheetIdToCoverage.get(styleSheetId) || []100 );101 cssCoverage.push({ url, ranges, text });102 }103 const coverageAfter = [104 ...cssCoverage.map(results => ({105 ...results,106 type: 'CSS'107 }))108 ];109 const result = await formatCoverage(coverageAfter);110 return result;111 }112 async prettyCss(coverage) {...
JSCoverage.js
Source:JSCoverage.js
...101 const text = this._scriptSources.get(entry.scriptId)102 if (text === undefined || url === undefined) continue103 const flattenRanges = []104 for (const func of entry.functions) flattenRanges.push(...func.ranges)105 const ranges = convertToDisjointRanges(flattenRanges)106 coverage.push({ url, ranges, text })107 }108 return coverage109 }110}...
CSSCoverage.js
Source:CSSCoverage.js
...94 const coverage = []95 for (const styleSheetId of this._stylesheetURLs.keys()) {96 const url = this._stylesheetURLs.get(styleSheetId)97 const text = this._stylesheetSources.get(styleSheetId)98 const ranges = convertToDisjointRanges(99 styleSheetIdToCoverage.get(styleSheetId) || []100 )101 coverage.push({ url, ranges, text })102 }103 return coverage104 }105}...
util.js
Source:util.js
...8 merged[entry.url].ranges.push(...entry.ranges);9 }10 }11 Object.values(merged).forEach(entry => {12 entry.range = convertToDisjointRanges(entry.ranges);13 });14 return Object.values(merged);15};16// https://github.com/GoogleChrome/puppeteer/blob/83c327a0f6b343865304059dd09323e4f8285217/lib/Coverage.js#L26917/**18 * @param {!Array<!{startOffset:number, endOffset:number, count:number}>} nestedRanges19 * @return {!Array<!{start:number, end:number}>}20 */21function convertToDisjointRanges(nestedRanges) {22 const points = [];23 for (const range of nestedRanges) {24 points.push({ offset: range.startOffset, type: 0, range });25 points.push({ offset: range.endOffset, type: 1, range });26 }27 // Sort points to form a valid parenthesis sequence.28 points.sort((a, b) => {29 // Sort with increasing offsets.30 if (a.offset !== b.offset) return a.offset - b.offset;31 // All "end" points should go before "start" points.32 if (a.type !== b.type) return b.type - a.type;33 const aLength = a.range.endOffset - a.range.startOffset;34 const bLength = b.range.endOffset - b.range.startOffset;35 // For two "start" points, the one with longer range goes first....
Using AI Code Generation
1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4 const browser = await puppeteer.launch();5 const page = await browser.newPage();6 const input = await page.$('input');7 await input.click();8 await input.type('Hello World');9 await input.press('Enter');10 await page.waitForNavigation();11 await page.screenshot({path: 'example.png'});12 await browser.close();13})();14const puppeteer = require('puppeteer');15const fs = require('fs');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 const input = await page.$('input');20 await input.click();21 await input.type('Hello World');22 await input.press('Enter');23 await page.waitForNavigation();24 await page.screenshot({path: 'example.png'});25 await browser.close();26})();27const puppeteer = require('puppeteer');28const fs = require('fs');29(async () => {30 const browser = await puppeteer.launch();31 const page = await browser.newPage();32 const input = await page.$('input');33 await input.click();34 await input.type('Hello World');35 await input.press('Enter');36 await page.waitForNavigation();37 await page.screenshot({path: 'example.png'});38 await browser.close();39})();40const puppeteer = require('puppeteer');41const fs = require('fs');42(async () => {43 const browser = await puppeteer.launch();44 const page = await browser.newPage();45 const input = await page.$('input');46 await input.click();47 await input.type('Hello World');48 await input.press('Enter');49 await page.waitForNavigation();50 await page.screenshot({path: 'example.png'});51 await browser.close();52})();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.pdf({path: 'google.pdf', format: 'A4'});6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 await page.pdf({path: 'google.pdf', format: 'A4'});13 await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 await page.pdf({path: 'google.pdf', format: 'A4'});20 await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24 const browser = await puppeteer.launch();25 const page = await browser.newPage();26 await page.pdf({path: 'google.pdf', format: 'A4'});27 await browser.close();28})();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.screenshot({ path: 'google.png' });6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 await page.screenshot({ path: 'google.png' });13 await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 await page.screenshot({ path: 'google.png' });20 await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24 const browser = await puppeteer.launch();25 const page = await browser.newPage();26 await page.screenshot({ path: 'google.png' });27 await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31 const browser = await puppeteer.launch();32 const page = await browser.newPage();33 await page.screenshot({ path: 'google.png' });34 await browser.close();35})();36const puppeteer = require('puppeteer');37(async () => {38 const browser = await puppeteer.launch();39 const page = await browser.newPage();40 await page.screenshot({ path: 'google.png' });41 await browser.close();42})();43const puppeteer = require('p
Using AI Code Generation
1const puppeteer = require("puppeteer");2const fs = require("fs");3(async () => {4 const browser = await puppeteer.launch();5 const page = await browser.newPage();6 const pdf = await page.pdf({7 margin: {8 },9 });10 fs.writeFile("test.pdf", pdf, (err) => {11 if (err) throw err;12 });13 await browser.close();14})();
Using AI Code Generation
1(async () => {2 const browser = await puppeteer.launch();3 const page = await browser.newPage();4 await page.waitForSelector('input[name="q"]');5 await page.type('input[name="q"]', 'puppeteer');6 await page.keyboard.press('Enter');7 await page.waitForSelector('h3');8 const results = await page.$$eval('h3', (elements) => {9 return elements.map((element) => element.innerText);10 });11 console.log(results);12 await browser.close();13})();14(async () => {15 const browser = await puppeteer.launch();16 const page = await browser.newPage();17 await page.waitForSelector('input[name="q"]');18 await page.type('input[name="q"]', 'puppeteer');19 await page.keyboard.press('Enter');20 await page.waitForSelector('h3');21 const results = await page.$$eval('h3', (elements) => {22 return elements.map((el
Using AI Code Generation
1const puppeteer = require('puppeteer');2const fs = require('fs');3const path = require('path');4const { convertToDisjointRanges } = require('puppeteer/lib/NetworkManager');5(async () => {6const browser = await puppeteer.launch({7});8const page = await browser.newPage();9const ranges = convertToDisjointRanges([0, 100, 200, 300, 400, 500]);10await page.setRequestInterception(true);11page.on('request', request => {12if (ranges.some(range => request.url().endsWith(range))) {13request.abort();14} else {15request.continue();16}17});18})();
Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!