How to use assertNoFirstContentfulPaint method in wpt

Best JavaScript code snippet using wpt

utils.js

Source:utils.js Github

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...10 });11}12// Asserts that there is currently no FCP reported. Pass t to add some wait, in case CSS is loaded13// and FCP is incorrectly fired afterwards.14async function assertNoFirstContentfulPaint(t) {15 await waitForAnimationFrames(3);16 assert_equals(performance.getEntriesByName('first-contentful-paint').length, 0, 'First contentful paint marked too early. ');17}18// Function that is resolved once FCP is reported, using PerformanceObserver. It rejects after a long19// wait time so that failing tests don't timeout.20async function assertFirstContentfulPaint(t) {21 return new Promise(resolve => {22 function checkFCP() {23 if (performance.getEntriesByName('first-contentful-paint').length === 1) {24 resolve();25 } else {26 requestAnimationFrame(checkFCP)27 }28 }29 t.step(checkFCP);30 });31}32async function test_fcp(label) {33 const style = document.createElement('style');34 document.head.appendChild(style);35 await promise_test(async t => {36 assert_precondition(window.PerformancePaintTiming, "Paint Timing isn't supported.");37 const main = document.getElementById('main');38 await new Promise(r => window.addEventListener('load', r));39 await assertNoFirstContentfulPaint(t);40 main.className = 'preFCP';41 await assertNoFirstContentfulPaint(t);42 main.className = 'contentful';43 await assertFirstContentfulPaint(t);44 }, label);...

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Using AI Code Generation

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1const assertNoFirstContentfulPaint = require('wpt-api').assertNoFirstContentfulPaint;2assertNoFirstContentfulPaint(url)3 .then((result) => {4 console.log(result);5 })6 .catch((err) => {7 console.log(err);8 });9const assertNoFirstMeaningfulPaint = require('wpt-api').assertNoFirstMeaningfulPaint;10assertNoFirstMeaningfulPaint(url)11 .then((result) => {12 console.log(result);13 })14 .catch((err) => {15 console.log(err);16 });17const assertNoFirstCPUIdle = require('wpt-api').assertNoFirstCPUIdle;18assertNoFirstCPUIdle(url)19 .then((result) => {20 console.log(result);21 })22 .catch((err) => {23 console.log(err);24 });25const assertNoFirstInteractive = require('wpt-api').assertNoFirstInteractive;26assertNoFirstInteractive(url)27 .then((result) => {28 console.log(result);29 })30 .catch((err) => {31 console.log(err);32 });

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Using AI Code Generation

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1const wpt = require('webpagetest');2const wptClient = wpt('www.webpagetest.org');3 console.log(data);4});5const wpt = require('webpagetest');6const wptClient = wpt('www.webpagetest.org');7 console.log(data);8});9const wpt = require('webpagetest');10const wptClient = wpt('www.webpagetest.org');11 console.log(data);12});13const wpt = require('webpagetest');14const wptClient = wpt('www.webpagetest.org');15 console.log(data);16});17const wpt = require('webpagetest');18const wptClient = wpt('www.webpagetest.org');19 console.log(data);20});21const wpt = require('webpagetest');22const wptClient = wpt('www.webpagetest.org');23 console.log(data);24});25const wpt = require('webpagetest');26const wptClient = wpt('www.webpagetest.org');

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Using AI Code Generation

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1(async () => {2 const {browser, page} = await startBrowser();3 await assertNoFirstContentfulPaint(page);4 await browser.close();5})();6const assertNoFirstContentfulPaint = async (page) => {7 await page.waitFor(10000);8 const metrics = await page.metrics();9 console.log(metrics);10 if (metrics.FirstContentfulPaint > 0) {11 throw new Error('FirstContentfulPaint is not 0');12 }13};14const startBrowser = async () => {15 const browser = await puppeteer.launch({16 });17 const page = await browser.newPage();18 return {browser, page};19};20module.exports = {21};

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Using AI Code Generation

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1const wptb = require('wptb-api');2const assert = require('assert');3(async () => {4 const api = new wptb();5 const result = await test.run();6 const resultData = await result.get();7 const resultId = await result.getId();8 const resultUrl = await result.getUrl();9 const resultTest = await result.getTest();10 const resultTestUrl = await result.getTestUrl();11 const resultTestData = await result.getTestData();12 const resultTestDataId = await result.getTestDataId();13 const resultTestDataUrl = await result.getTestDataUrl();14 const resultTestDataTest = await result.getTestDataTest();15 const resultTestDataTestUrl = await result.getTestDataTestUrl();16 const resultTestDataTestData = await result.getTestDataTestData();17 const resultTestDataTestDataId = await result.getTestDataTestDataId();18 const resultTestDataTestDataUrl = await result.getTestDataTestDataUrl();19 const resultTestDataTestDataTest = await result.getTestDataTestDataTest();20 const resultTestDataTestDataTestUrl = await result.getTestDataTestDataTestUrl();21 const resultTestDataTestDataTestData = await result.getTestDataTestDataTestData();22 const resultTestDataTestDataTestDataId = await result.getTestDataTestDataTestDataId();23 const resultTestDataTestDataTestDataUrl = await result.getTestDataTestDataTestDataUrl();24 const resultTestDataTestDataTestDataTest = await result.getTestDataTestDataTestDataTest();25 const resultTestDataTestDataTestDataTestUrl = await result.getTestDataTestDataTestDataTestUrl();26 const resultTestDataTestDataTestDataTestData = await result.getTestDataTestDataTestDataTestData();27 const resultTestDataTestDataTestDataTestDataId = await result.getTestDataTestDataTestDataTestDataId();28 const resultTestDataTestDataTestDataTestDataUrl = await result.getTestDataTestDataTestDataTestDataUrl();29 const resultTestDataTestDataTestDataTestDataTest = await result.getTestDataTestDataTestDataTestDataTest();30 const resultTestDataTestDataTestDataTestDataTestUrl = await result.getTestDataTestDataTestDataTestDataTestUrl();

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Using AI Code Generation

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1async function testNoFirstContentfulPaint() {2 try {3 await assertNoFirstContentfulPaint();4 } catch (e) {5 }6}7async function testNoFirstInputDelay() {8 try {9 await assertNoFirstInputDelay();10 } catch (e) {11 }12}13async function testNoLargestContentfulPaint() {14 try {15 await assertNoLargestContentfulPaint();16 } catch (e) {17 }18}19async function testNoLayoutShift() {20 try {21 await assertNoLayoutShift();22 } catch (e) {23 }24}25async function testNoLongTasks() {26 try {27 await assertNoLongTasks();28 } catch (e) {29 }30}31async function testNoSpeedIndex() {32 try {33 await assertNoSpeedIndex();34 } catch (e) {35 }36}37async function testNoTimeToFirstByte() {38 try {39 await assertNoTimeToFirstByte();40 } catch (e) {

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