How to use makeOffscreenCanvas method in wpt

Best JavaScript code snippet using wpt

common.js

Source:common.js

...14        testCtx.fillRect(10, 10, 10, 10);15        resolve(testCanvas);16    });17}18function makeOffscreenCanvas() {19    return new Promise(resolve => {20        let canvas = new OffscreenCanvas(20, 20);21        var testCtx = canvas.getContext("2d");22        testCtx.fillStyle = "rgb(255, 0, 0)";23        testCtx.fillRect(0, 0, 10, 10);24        testCtx.fillStyle = "rgb(0, 255, 0)";25        testCtx.fillRect(10, 0, 10, 10);26        testCtx.fillStyle = "rgb(0, 0, 255)";27        testCtx.fillRect(0, 10, 10, 10);28        testCtx.fillStyle = "rgb(0, 0, 0)";29        testCtx.fillRect(10, 10, 10, 10);30        resolve(canvas);31    });32}...

Using AI Code Generation

1var canvas = makeOffscreenCanvas(100, 100);2var ctx = canvas.getContext('2d');3ctx.fillStyle = 'red';4ctx.fillRect(0, 0, 50, 50);5ctx.fillStyle = 'green';6ctx.fillRect(50, 0, 50, 50);7ctx.fillStyle = 'blue';8ctx.fillRect(0, 50, 50, 50);9ctx.fillStyle = 'yellow';10ctx.fillRect(50, 50, 50, 50);11postMessage(canvas, [canvas]);12function test() {13  var worker = new Worker('test.js');14  worker.onmessage = function(e) {15    var image = new Image();16    image.src = e.data.convertToBlob().URL;17    document.body.appendChild(image);18  }19}20<body onload="test()">

Using AI Code Generation

1var canvas = wpt.makeOffscreenCanvas(100, 100);2var ctx = canvas.getContext('2d');3ctx.fillStyle = 'rgb(200, 0, 0)';4ctx.fillRect(10, 10, 55, 50);5var dataUrl = wpt.toDataURL(canvas);6var blob = wpt.dataURLToBlob(dataUrl);7wpt.uploadBlob(blob);

Using AI Code Generation

1let offscreenCanvas = await makeOffscreenCanvas(100, 100);2let context = offscreenCanvas.getContext('2d');3context.fillStyle = 'red';4context.fillRect(0, 0, 100, 100);5let imageData = context.getImageData(0, 0, 100, 100);6let data = imageData.data;7for (let i = 0; i < data.length; i += 4) {8  if (data[i] != 255 || data[i + 1] != 0 || data[i + 2] != 0 || data[i + 3] != 255) {9    throw "Expected red pixel";10  }11}

Using AI Code Generation

1let canvas = await driver.makeOffscreenCanvas(100, 100);2let context = canvas.getContext('2d');3context.fillStyle = 'red';4context.fillRect(0, 0, 100, 100);5let imageData = context.getImageData(0, 0, 100, 100);6let data = imageData.data;7assert_equals(data[0], 255);8assert_equals(data[1], 0);9assert_equals(data[2], 0);10assert_equals(data[3], 255);11for (let i = 4; i < data.length; i++) {12  assert_equals(data[i], 0);13}

Using AI Code Generation

1var canvas = wptdriver.makeOffscreenCanvas(100, 100);2var ctx = canvas.getContext('2d');3ctx.fillStyle = 'red';4ctx.fillRect(0, 0, 100, 100);5wptdriver.saveOffscreenCanvas(canvas, 'test.png', function(err) {6    if (err) {7        console.log('Error saving canvas: ' + err);8    } else {9        console.log('Canvas saved');10    }11});12var canvas = wptdriver.makeOffscreenCanvas(100, 100);13var ctx = canvas.getContext('2d');14ctx.fillStyle = 'red';15ctx.fillRect(0, 0, 100, 100);16wptdriver.saveOffscreenCanvas(canvas, 'test.png', function(err) {17    if (err) {18        console.log('Error saving canvas: ' + err);19    } else {20        console.log('Canvas saved');21    }22});

Using AI Code Generation

1var wpt = require('webpagetest');2var options = {3};4wpt.runTest('www.webpagetest.org', options, function(err, data) {5  if (err) return console.error(err);6  console.log(data);7});8var wpt = require('webpagetest');9var options = {10};11wpt.runTest('www.webpagetest.org', options, function(err, data) {12  if (err) return console.error(err);13  console.log(data);14});15var wpt = require('webpagetest');16var options = {

Using AI Code Generation

1async function test() {2  const canvas = await makeOffscreenCanvas(100, 100);3}4async function test() {5  const canvas = new OffscreenCanvas(100, 100);6}7const canvas = await makeOffscreenCanvas(100, 100);8const canvas = new OffscreenCanvas(100, 100);

Using AI Code Generation

1var context = makeOffscreenCanvas(400, 400);2context.fillStyle = 'rgb(255, 255, 255)';3context.fillRect(0, 0, 400, 400);4context.fillStyle = 'rgb(0, 0, 0)';5context.font = '24px Arial';6context.fillText('Hello, World', 0, 100);7context.fillText('Hello, World', 0, 200);8context.fillText('Hello, World', 0, 300);9assert_equals(context.measureText('Hello, World').width, 200, "Text width should be 200");10assert_equals(context.measureText('Hello, World').width, 200, "Text width should be 200");11assert_equals(context.measureText('Hello, World').width, 200, "Text width should be 200");

Using AI Code Generation

1var wpt = await wptdriver.makeOffscreenCanvas();2var imgData = wpt.getImageData();3var wpt = await wptdriver.makeOffscreenCanvas();4var imgData = wpt.getImageData();5var wpt = await wptdriver.makeOffscreenCanvas();6var imgData = wpt.getImageData();7var wpt = await wptdriver.makeOffscreenCanvas();8var imgData = wpt.getImageData();9var wpt = await wptdriver.makeOffscreenCanvas();10var imgData = wpt.getImageData();11var wpt = await wptdriver.makeOffscreenCanvas();12var imgData = wpt.getImageData();13var wpt = await wptdriver.makeOffscreenCanvas();14var imgData = wpt.getImageData();

Automation Testing Tutorials

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.