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How to use longTask method in wpt

Best JavaScript code snippet using wpt

longTask.js

Source:longTask.js

1/**2 * å¡é¡¿ï¼çæ§æµè§å¨ä¸»è¿ç¨æç»æ§è¡æ¶é´å¤§äº50msçæåµ 3 * https://www.w3.org/TR/longtasks/4 * https://www.chromestatus.com/features/57384711844003845 * tti åèï¼https://web.dev/tti/6 * env: chrome>=587 */8import getLastAction from '../utils/getLastAction'9import genSelector from '../utils/genSelector'10import requestIdleCallback from '../utils/requestIdleCallback'11import { watchPageVisiblityChange } from '../utils/visibilityChange'12import { formatTime } from '../utils/util';13const MAX_LONG_TASK_PER_PAGE = 100;14const MIN_LONG_TASK_DURATION = 500;15const TTI_QUITE_WINDOW = 3000;16const TBT_BASE = 50;17FEDLOG.longTask = function () {18    if (!window.PerformanceLongTaskTiming) {19        return;20    }21    FEDLOG._lastLongtaskSelList = []22    window.FEDLOG_TBT = 023    var timmer, mileage = performance.now();24    var observer = new PerformanceObserver((list) => {25        list.getEntries().forEach(entry => {26            // æåä¸æ¬¡åºç°longtaskæ¶é´è®°åtti27            mileage = performance.now()28            clearTimeout(timmer);29            timmer = setTimeout(() => {30                window.FEDLOG_TTI = mileage;31                if (entry.duration > TBT_BASE) {32                    window.FEDLOG_TBT += entry.duration - TBT_BASE33                }34            }, TTI_QUITE_WINDOW);35            if (entry.duration > MIN_LONG_TASK_DURATION36                && FEDLOG._lastLongtaskSelList.length < MAX_LONG_TASK_PER_PAGE) {37                let e = getLastAction();38                requestIdleCallback(() => {39                    // æåæä½çèç¹çCSSéæ©å¨40                    let sel = e ? genSelector(e.path || e.target) : ''41                    // é¡µé¢åä¸ä¸ªsel åªåéä¸æ¬¡42                    if (FEDLOG._lastLongtaskSelList.indexOf(sel) < 0) {43                        FEDLOG.send({44                            t1: 'exp',45                            t2: 'longtask',46                            d1: formatTime(entry.startTime),// å¼å§æ¶é´47                            d2: formatTime(entry.duration),// æç»æ¶é´48                            d3: sel49                        });50                        FEDLOG._lastLongtaskSelList.push(sel)51                    }52                });53            }54        });55        if (FEDLOG._lastLongtaskSelList.length >= MAX_LONG_TASK_PER_PAGE) {56            observer.disconnect();57        }58    });59    setTimeout(() => {60        window.FEDLOG_TTI = mileage;61    }, TTI_QUITE_WINDOW * 7)62    observer.observe({ entryTypes: ["longtask"] });63    watchPageVisiblityChange(function (isVisible) {64        if (!isVisible) {65            observer.disconnect();66        } else {67            setTimeout(function () {68                observer.observe({ entryTypes: ["longtask"] });69            }, 100);70        }71    })...

promises.js

Source:promises.js

...9  },timer);10});11// Just do this longTask one time ...12// Notice that code after this actually executes before this completes.13longTask('First One')14  .then(task => console.log('Task', task))15  .catch(console.error);16// Running many async things individually (no guarantee of order)17console.log('------- Individually ----------');18longTask('i - 1').then(task => console.log('Task', task)).catch(console.error);19longTask('i - 2').then(task => console.log('Task', task)).catch(console.error);20longTask('i - 3').then(task => console.log('Task', task)).catch(console.error);21longTask('i - 4').then(task => console.log('Task', task)).catch(console.error);22// Running many async things in a series -- These will always happen in order23console.log('------- Chained ----------');24longTask('c - 1')25  .then( data => { console.log(data); return longTask('c - 2'); } )26  .then( data => { console.log(data); return longTask('c - 3'); } )27  .then( data => { console.log(data); return longTask('c - 4'); } );28// Running Many Async Things Simultaneously ... they may not all finish in order, but the collected responses will be GIVEN to you in order29console.log('------- Promise.all() ----------');30let stuffToDo = [];31for( let i = 1; i <= 10; i++ ) {32  stuffToDo.push(longTask(`pa - ${i}`));33}34Promise.all(stuffToDo)35  .then(things => console.log('Promise.all() Response Array', things))...

Using AI Code Generation

1var wpt = require('webpagetest');2var wptInstance = wpt('www.webpagetest.org');3    if (err) {4        console.log(err);5    } else {6        console.log(data);7    }8});9wptInstance.longTask(data.data.testId, function(err, data) {10    if (err) {11        console.log(err);12    } else {13        console.log(data);14    }15});16var wpt = require('webpagetest');17var wptInstance = wpt('www.webpagetest.org');18    if (err) {19        console.log(err);20    } else {21        console.log(data);22    }23});24wptInstance.getLocations(function(err, data) {25    if (err) {26        console.log(err);27    } else {28        console.log(data);29    }30});31var wpt = require('webpagetest');32var wptInstance = wpt('www.webpagetest.org');33    if (err) {34        console.log(err);35    } else {36        console.log(data);37    }38});39wptInstance.getTesters(function(err, data) {40    if (err) {41        console.log(err);42    } else {43        console.log(data);44    }45});46var wpt = require('webpagetest');47var wptInstance = wpt('www.webpagetest.org');48    if (err) {49        console.log(err);50    } else {51        console.log(data);52    }53});54wptInstance.getTesters(function(err, data) {55    if (err) {56        console.log(err);57    } else {58        console.log(data);59    }60});61var wpt = require('webpagetest');62var wptInstance = wpt('www.webpagetest.org');

Using AI Code Generation

1wpt.longTask(url, function(err, data) {2  if(err) return console.log(err);3  console.log(data);4});5wpt.render(url, function(err, data) {6  if(err) return console.log(err);7  console.log(data);8});9wpt.runTest(url, function(err, data) {10  if(err) return console.log(err);11  console.log(data);12});13wpt.testStatus(url, function(err, data) {14  if(err) return console.log(err);15  console.log(data);16});17wpt.testResults(url, function(err, data) {18  if(err) return console.log(err);19  console.log(data);20});21wpt.getLocations(function(err, data) {22  if(err) return console.log(err);23  console.log(data);24});25wpt.getBrowsers(function(err, data) {26  if(err) return console.log(err);27  console.log(data);28});29wpt.getConnectivity(function(err, data) {30  if(err) return console.log(err);31  console.log(data);32});33wpt.getTesters(function(err, data) {34  if(err) return console.log(err);35  console.log(data);36});37wpt.getChromeTrace(url, function(err, data) {38  if(err) return console.log(err);39  console.log(data);40});41wpt.getVideo(url, function(err, data) {42  if(err) return console.log(err);43  console.log(data);44});

Using AI Code Generation

1var wpt = require('webpagetest')('www.webpagetest.org');2var options = {3};4wpt.runTest(url, options, function(err, data) {5    if (err) return console.error(err);6    console.log('Test status: ' + data.statusCode);7    console.log('Test ID: ' + data.data.testId);8    console.log('Test URL: ' + data.data.summary);9    wpt.getTestResults(data.data.testId, function(err, data) {10        if (err) return console.error(err);11        console.log('First View: ' + JSON.stringify(data.data.runs[1].firstView));12        console.log('Repeat View: ' + JSON.stringify(data.data.runs[1].repeatView));13    });14});15var wpt = require('webpagetest')('www.webpagetest.org');16var options = {17};18wpt.runTest(url, options, function(err, data) {19    if (err) return console.error(err);20    console.log('Test status: ' + data.statusCode);21    console.log('Test ID: ' + data.data.testId);22    console.log('Test URL: ' + data.data.summary);23    wpt.getTestResults(data.data.testId, function(err, data) {24        if (err) return console.error(err);25        console.log('First View: ' + JSON.stringify(data.data.runs[1].firstView));26        console.log('Repeat View: ' + JSON.stringify(data.data.runs[1].repeatView));27    });28});29var wpt = require('webpagetest')('www.webpagetest.org');

Using AI Code Generation

1var wpt = require('./wpt.js');2var wpt = new WebPageTest('www.webpagetest.org');3var options = {4};5    if (err) return console.error(err);6    console.log(data);7    wpt.getTestResults(data.data.testId, function(err, data) {8        if (err) return console.error(err);9        console.log(data);10    });11});

Using AI Code Generation

1var wpt = require('webpagetest');2var options = {3};4wpt.longTask(url, options, function(err, data) {5  if (err) return console.log(err);6  console.log(data);7});

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