How to use rafCb method in wpt

Best JavaScript code snippet using wpt

index.test.js

Source:index.test.js Github

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1import React from 'react';2import { mount } from 'enzyme';3import { checkIfImageCached, loadImage } from './utils';4import ImageLoader, { tempImg } from './index';5import styles, {6 REVEAL_DURATION,7} from './styles';8jest.mock('./utils', () => jest.genMockFromModule('./utils'));9describe('ImageLoader', () => {10 const imgURL = 'http://fake.com/not/real.jpg';11 let wrapper;12 let img;13 let loaderProps;14 it('should add a custom CSS class to the container if one was supplied', () => {15 const altText = 'alt text';16 const className = 'custom-class';17 checkIfImageCached.mockReturnValue(true);18 wrapper = mount(<ImageLoader className={className} src={imgURL} alt={altText} />);19 expect(wrapper.childAt(0).props().className).toEqual(className);20 });21 it('should load an image if not cached', () => {22 const altText = 'alt text';23 let callback;24 checkIfImageCached.mockReturnValue(false);25 loadImage.mockImplementation((src, cb) => { callback = cb; });26 // render out everything in a loading state27 wrapper = mount(<ImageLoader src={imgURL} alt={altText} />);28 img = wrapper.find('img').instance();29 loaderProps = wrapper.find('LoadIndicator').props();30 expect(loadImage).toHaveBeenCalledWith(imgURL, expect.any(Function));31 expect(img.src).toEqual(tempImg);32 expect(img.alt).toEqual(altText);33 expect(loaderProps.visible).toBe(true);34 // loading has completed35 callback();36 wrapper.update();37 img = wrapper.find('img').instance();38 loaderProps = wrapper.find('LoadIndicator').props();39 expect(img.src).toEqual(imgURL);40 expect(loaderProps.visible).toBe(false);41 });42 it('should set the source if the image is cached', () => {43 checkIfImageCached.mockReturnValue(true);44 // render out everything in a loaded state45 wrapper = mount(<ImageLoader src={imgURL} />);46 img = wrapper.find('img').instance();47 loaderProps = wrapper.find('LoadIndicator').props();48 expect(img.src).toEqual(imgURL);49 expect(loaderProps.visible).toBe(false);50 });51 it('should NOT try to set state if component was unmounted before load listener completed', () => {52 let callback;53 checkIfImageCached.mockReturnValue(false);54 loadImage.mockImplementation((src, cb) => { callback = cb; });55 wrapper = mount(<ImageLoader src={imgURL} />);56 const instance = wrapper.instance();57 instance.componentWillUnmount();58 callback();59 wrapper.update();60 expect(instance.state.loaded).toBe(false);61 });62 describe('Animate image on load', () => {63 const mountIt = () => {64 wrapper = mount(<ImageLoader {...props} />);65 instance = wrapper.instance();66 instance.handleLoadedImage();67 wrapper.update();68 };69 let rafCB, instance, props;70 beforeEach(() => {71 jest.spyOn(global, 'requestAnimationFrame');72 global.requestAnimationFrame.mockImplementation((cb) => { rafCB = cb; });73 props = {74 src: imgURL,75 };76 jest.useFakeTimers();77 });78 afterEach(() => {79 global.requestAnimationFrame.mockRestore();80 });81 it('should add class to fade image in', () => {82 jest.spyOn(global, 'setTimeout');83 mountIt();84 expect(instance.state.loaded).toBe(true);85 expect(instance.state.revealImage).toBe(false);86 expect(wrapper.find('img').props().className).toEqual(`${ styles.img }`);87 // shouldn't call setState if not mounted88 instance.mounted = false;89 rafCB();90 jest.runTimersToTime(REVEAL_DURATION * 1000);91 wrapper.update();92 expect(instance.state.revealImage).not.toBe(true);93 // should update state and reveal image when mounted94 instance.mounted = true;95 rafCB();96 jest.runTimersToTime(REVEAL_DURATION * 1000);97 wrapper.update();98 expect(instance.state.revealImage).toBe(true);99 expect(wrapper.find('img').props().className).toEqual(`${ styles.img } is--loaded`);100 expect(global.setTimeout).not.toHaveBeenCalled();101 global.setTimeout.mockRestore();102 });103 it('should execute callback after the image has transitioned', () => {104 props.onLoad = jest.fn();105 mountIt();106 rafCB();107 jest.runTimersToTime(REVEAL_DURATION * 1000);108 wrapper.update();109 expect(props.onLoad).toHaveBeenCalled();110 });111 });...

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sketch.js

Source:sketch.js Github

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1let animReq 2let cvs3export function defineSketch(sketch, settings) {4 const {resize} = settings5 if(!cvs) {6 cvs = document.createElement('canvas')7 document.body.prepend(cvs)8 } else {9 clearAnimReq()10 }11 if (typeof (resize) === 'function') {12 window.onresize = () => {13 console.log("Window resized")14 const {width,height} = resize()15 clearAnimReq()16 start(cvs, sketch, {...settings, width, height})17 }18 }19 start(cvs, sketch, settings)20}21function clearAnimReq() {22 window.cancelAnimationFrame(animReq)23}24function start(cvs, sketch, settings) {25 const {width, height, animate} = settings26 cvs.width = width;27 cvs.height = height;28 const context = cvs.getContext("2d")29 30 const initialProps = {...settings, context, canvas: cvs}31 const renderFn = sketch( initialProps)32 let frame = 0;33 let time = 034 const startTime = new Date()35 const rafCb = (timestamp) => {36 const renderProps = {...initialProps, frame, time, timestamp}37 const {animate} = { ...renderProps, ...renderFn(renderProps)}38 frame++39 time = (new Date()) - startTime40 if (animate) animReq=window.requestAnimationFrame(rafCb)41 }42 if (animate) {43 animReq=window.requestAnimationFrame(rafCb)44 } else {45 renderFn(initialProps)46 }47 48}49export function newContext(w,h) {50 const c = document.createElement("canvas")51 c.width=w52 c.height=h53 return c.getContext("2d")...

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setInterval.js

Source:setInterval.js Github

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1// 基于rAF实现一个准确的定时器2function setIntervalNew (time,cb) {3 var lastTime = 04 function rAFcb (timestamp) {5 if(lastTime === 0) {6 lastTime = timestamp7 }8 if(timestamp - lastTime >= time) {9 cb()10 lastTime = timestamp11 }12 window.$zhtid = window.requestAnimationFrame(rAFcb)13 }14 window.$zhtid = window.requestAnimationFrame(rAFcb)15}16setIntervalNew(30000,() => {17 console.log(111)18})...

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Using AI Code Generation

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1var wpt = require('webpagetest');2var wptClient = wpt('www.webpagetest.org');3wptClient.runTest(url, {location:'Dulles:Chrome'}, function(err, data) {4 wptClient.pollTest(data.data.testId, function(err, data) {5 wptClient.rafCb(data.data.testId, function(err, data) {6 console.log(data);7 });8 });9});

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Using AI Code Generation

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1var rafCb = wpt.rafCb;2var rafCb = wpt.rafCb;3var rafCb = wpt.rafCb;4var rafCb = wpt.rafCb;5var rafCb = wpt.rafCb;6var rafCb = wpt.rafCb;7var rafCb = wpt.rafCb;8var rafCb = wpt.rafCb;9var rafCb = wpt.rafCb;10var rafCb = wpt.rafCb;11var rafCb = wpt.rafCb;12var rafCb = wpt.rafCb;

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Using AI Code Generation

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1const wpt = require('webpagetest');2const options = {3};4const client = wpt.createClient(options);5 if (err) return console.error(err);6 client.getTestResults(data.data.testId, function (err, data) {7 if (err) return console.error(err);8 console.log(data.data.runs[1].firstView.SpeedIndex);9 });10});11const wpt = require('webpagetest');12const options = {13};14const client = wpt.createClient(options);15 if (err) return console.error(err);16 client.getTestResults(data.data.testId, function (err, data) {17 if (err) return console.error(err);18 console.log(data.data.runs[1].firstView.SpeedIndex);19 });20});21const wpt = require('webpagetest');22const options = {23};24const client = wpt.createClient(options);25 if (err) return console.error(err);26 client.getTestResults(data.data.testId, function (err, data) {

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Using AI Code Generation

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

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