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How to use rafCb method in wpt

Best JavaScript code snippet using wpt

index.test.js

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  });...

sketch.js

Source: sketch.js

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")...

setInterval.js

Source: setInterval.js

1// åºäºrAFå®ç°ä¸ä¸ªåç¡®çå®æ¶å¨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})...

Using AI Code Generation

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});

Using AI Code Generation

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;

Using AI Code Generation

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) {

Using AI Code Generation

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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