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How to use readBattery method in Playwright Internal
Best JavaScript code snippet using playwright-internal
ReadBattery.js
Source:ReadBattery.js 
1import React, { useState } from 'react';2import classes from './ReadBattery.module.css';3export default function ReadBattery() {4 const [ message, setMessage ] = useState("_");5 const handleClick = () => {6 setMessage("_");7 navigator.bluetooth.requestDevice({8 filters: [{9 services: ['battery_service']10 }]11 }).then(device => {12 console.log('Got device:', device.name);13 console.log('id:', device.id);14 return device.gatt.connect(); // Chromium 49 and below use `connectGATT()` but from Chromium 50 it will use gatt.connect();15 })16 .then(server => {17 console.log('Getting Battery Serviceâ¦');18 return server.getPrimaryService('battery_service');19 })20 .then(service => {21 console.log('Getting Battery Characteristicâ¦');22 return service.getCharacteristic('battery_level');23 })24 .then(characteristic => {25 console.log('Reading battery levelâ¦');26 return characteristic.readValue();27 })28 .then(value => {29 value = value.buffer ? value : new DataView(value);30 console.log('Battery percentage:', value.getUint8(0));31 32 //setMessage('Battery percentage: ' + value.getUint8(0));33 setMessage(value.getUint8(0));34 })35 .catch(exception => {36 console.log(exception);37 });38 }39 return (40 <div className={classes.container}>41 <div className={classes.control}>42 <button onClick={handleClick} className={classes.button}>Read Battery Level</button>43 </div>44 <div className={classes.status}>45 46 <div className={classes.display}>47 <p className={classes.message}>Battery Level:</p>48 <p className={classes.submessage}>49 <span className={classes.value}>{message}</span>50 <span className={classes.unit}>%</span>51 </p>52 </div>53 54 55 </div>56 </div>57 )...
index.js
Source:index.js
...48 document.querySelector('.battery-fully').innerHTML = fully49 document.querySelector('.battery-remaining').innerHTML = remaining50 }51 if (navigator.battery) {52 readBattery(navigator.battery)53 } else if (navigator.getBattery) {54 navigator.getBattery().then(readBattery)55 } else {56 document.querySelector('.not-support').removeAttribute('hidden')57 }58 window.onload = function () {59 if (battery) {60 battery.addEventListener('chargingchange', function () {61 readBattery()62 })63 battery.addEventListener('levelchange', function () {64 readBattery()65 })66 }67 }...
battery-warn-cron.js
Source:battery-warn-cron.js
...47 // TODO: HOW CAN WE KILL THE SUBPROCESS SPAWNED BY CVLC?48 // this.runMusic();49 },50 check: function() {51 const status = readBattery('status');52 if (/Charging/.test(readBattery('status'))) {53 this.ok();54 } else {55 const capacity = parseInt(readBattery('capacity'), 10);56 if (capacity < threshold.critical) {57 this.notify(this.critical);58 } else if (capacity < threshold.warn) {59 this.notify(this.warn);60 }61 }62 },63 run: function() {64 this.checkInterval = setInterval(() => this.check(), 1 * SECONDS);65 }66});...
batteryInfo.js
Source:batteryInfo.js
...67 function addListeners(battery) {89 battery.addEventListener("levelchange", function() {10 readBattery(battery);11 });1213 battery.addEventListener('chargingchange', function() {14 readBattery(battery);15 });1617 battery.addEventListener('chargingtimechange', function() {18 readBattery(battery);19 });2021 battery.addEventListener('dischargingtimechange', function() {22 readBattery(battery);23 });2425 readBattery(battery);2627 }28293031 function readBattery(battery) {3233 var batteryInfoEvent,34 detail = {};3536 if (typeof battery !== "undefined") {3738 if ( typeof battery.charging !== "undefined") {39 detail.batteryStatus = battery.charging ? 'Adapter' : 'Battery';40 }4142 if (typeof battery.level !== "undefined") {4344 if (battery.level == 1 && battery.charging) {45 /* could be a device without battery plugged in, don't report the 100% level */46 } else {47 detail.batteryLevel = parseFloat(battery.level * 100).toFixed(0) + '%';48 }4950 }51 }5253 batteryInfoEvent = new CustomEvent("__BatteryInfoEvent", {54 detail: detail,55 bubbles: true,56 cancelable: true57 });58 dispatchEvent(batteryInfoEvent);596061 return detail;6263 }646566 var init = function(event) {6768 if (typeof event !== "undefined") {69 if (typeof event.detail !== "undefined" && event.type == "__BatteryInfoEvent") {70 return event.detail;71 }72 }7374 };75767778 if (navigator.battery) {79 readBattery(navigator.battery);80 } else if (navigator.getBattery) {81 navigator.getBattery().then(addListeners);82 }838485 /* public methods... */86 return {87 init : init,88 defaultListeners : ["__BatteryInfoEvent","dischargingtimechange","chargingtimechange","chargingchange","levelchange"]89 };90
...
App.js
Source:App.js
1import React from 'react';2import {3 BrowserRouter as Router,4 Switch,5 //Route,6 Link7} from "react-router-dom";8import classes from './App.module.css';9import Routes from './Routes';10import PreloadComponents from './PreloadComponents';11//import Home from './Home';12//import LEScan from './components/LEScan';13//import ReadBattery from './components/ReadBattery';14//import WriteHeart from './components/WriteHeart';15//import Notification from './components/Notification';16/*17function Home() {18 return (19 <main className={classes.main}>20 <Link className={classes.link} to="/scan"><button className={classes.button}>LE Scan for Advertisement</button></Link>21 <Link className={classes.link} to="/notify"><button className={classes.button}>Read and Write Value using Notification</button></Link>22 <Link className={classes.link} to="/battery"><button className={classes.button}>Read Battery Level from a Bluetooth Device</button></Link>23 <Link className={classes.link} to="/heart"><button className={classes.button}>Write Value to a Bluetooth Device</button></Link>24 </main>25 )26}27...28<Switch>29 <Route exact path='/' component={Home} />30 <Route exact path='/scan' component={LEScan} />31 <Route exact path='/battery' component={ReadBattery} />32 <Route exact path='/heart' component={WriteHeart} />33 <Route exact path='/notify' component={Notification} />34 </Switch>35*/36function App() {37 38 return (39 <Router>40 <div className={classes.container}>41 <div className={classes.header}>42 <Link className={classes.toplink} to='/'><h4 className={classes.title}>Web Bluetooth API Demo</h4></Link>43 </div>44 <React.Suspense fallback={<span>Loading....</span>}>45 <PreloadComponents />46 <Switch>47 <Routes />48 </Switch>49 </React.Suspense>50 </div>51 </Router>52 )53}...
battery.js
Source:battery.js
...48 clearTimeout(toId);49 $.Topic("startComicNav").unsubscribe( stopStuff );50 };51 $.Topic("startComicNav").subscribe( stopStuff );52 function readBattery(b) {53 battery = b || battery;54 55 var cid = $("#sizer").attr("comicid");56 if (cid === initialComicId) {57 // only do stuff if we're still on the same comic58 var percentage = parseFloat((battery.level * 100).toFixed(2));59 updateWithBatteryLevel(percentage);60 toId = setTimeout(readBattery, 30000);61 }62 }63 if (navigator.battery) {64 readBattery(navigator.battery);65 } else if (navigator.getBattery) {66 navigator.getBattery().then(readBattery);67 } else {68 // not supported. fake it!69 readBattery({70 level: Math.random()71 });72 }73 ...
batteryMonitorSketch.js
Source:batteryMonitorSketch.js
...9e', function(error, stdout, stderr) {});10// Enable this to put the system under significant stress!11// child = exec('stress -c 2 -i 2 -m 2 -d 2', function(error, stdout, stderr) {});12console.log("Reading I2C..");13function readBattery() {14 var d = i2c.readReg(0x2c);15 console.log("Result (CSOC %): " + d);16 var voltage = readInt16(0x09, 0x08);17 console.log('Reported Voltage High (mV): ' + voltage);18 console.log('Time to full (minutes): ' + readInt16(0x19, 0x18));19 console.log('Time to empty (minutes): ' + readInt16(0x17, 0x16));20 var temperature = readInt16(0x07, 0x06);21 temperature = (((temperature * .25) - 273.15) * 1.8) + 32;22 console.log('Temperature (F): ' + Math.round(temperature));23 var current = readInt16(0x15, 0x14);24 current = (current * 3.57) / 75;25 console.log('Current (mA): ' + current);26 console.log('Power consumption (W): ' + ((current / 1000) * (voltage / 1000)))27;28}29function readInt16(highReg, lowReg) {30 // from page 26 of the docs, this is the way to read 16 bit values.31 var high = i2c.readReg(highReg);32 var low = i2c.readReg(lowReg);33 var high2 = i2c.readReg(highReg);34 if( high2 !== high) {35 low = i2c.readReg(lowReg);36 high = high2;37 }38 return (high << 8) | low;39}40setInterval(readBattery, 1000);...
Routes.js
Source:Routes.js
1import React from "react";2import { Route, withRouter } from "react-router-dom";3const Home = React.lazy(() => import('./Home'));4const LEScan = React.lazy(() => import('./components/LEScan'));5const ReadBattery = React.lazy(() => import('./components/ReadBattery'));6const WriteHeart = React.lazy(() => import('./components/WriteHeart'));7const Notification = React.lazy(() => import('./components/Notification'));8export const routes = [9 {10 component: Home,11 path: "/"12 },13 {14 component: LEScan,15 path: "/scan"16 },17 {18 component: ReadBattery,19 path: "/battery"20 },21 {22 component: WriteHeart,23 path: "/heart"24 },25 {26 component: Notification,27 path: "/notify"28 }29]30const Routes = withRouter(({ location }) => {31 console.log(location);32 return (33 <React.Fragment>34 {35 routes.map(route => {36 return (37 <Route exact 38 key={route.path} 39 path={route.path} 40 component={route.component}41 />42 )43 })44 }45 </React.Fragment>46 )47})...
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 const client = await page.context().newCDPSession(page);7 const battery = await client.send('Power.readBattery');8 console.log(battery);9 await browser.close();10})();11{12}
Using AI Code Generation
1const { readBattery } = require('playwright-core/lib/server/chromium/crBrowser');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 const battery = await readBattery(page);7 console.log(battery);8 await browser.close();9})();
Using AI Code Generation
1const { chromium } = require('playwright');2const { readBattery } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const battery = await readBattery(page);8 console.log(battery);9 await browser.close();10})();11{12}
Using AI Code Generation
1const {readBattery} = require('playwright/lib/server/chromium/crBrowser');2const {chromium} = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const battery = await readBattery(page);8 console.log(battery);9 await browser.close();10})();11{charging: true, chargingTime: 0, dischargingTime: Infinity, level: 1}
Using AI Code Generation
1const {readBattery} = require('playwright/lib/server/chromium/crBrowser');2const chromium = require('playwright').chromium;3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6const battery = await readBattery(page);7console.log(battery);8const {readBattery} = require('playwright/lib/server/chromium/crBrowser');9const chromium = require('playwright').chromium;10const browser = await chromium.launch();11const context = await browser.newContext();12const page = await context.newPage();13const battery = await readBattery(page);14console.log(battery);15const {readBattery} = require('playwright/lib/server/chromium/crBrowser');16const chromium = require('playwright').chromium;17const browser = await chromium.launch();18const context = await browser.newContext();19const page = await context.newPage();20const battery = await readBattery(page);21console.log(battery);22const {readBattery} = require('playwright/lib/server/chromium/crBrowser');23const chromium = require('playwright').chromium;24const browser = await chromium.launch();25const context = await browser.newContext();26const page = await context.newPage();27const battery = await readBattery(page);28console.log(battery);29const {readBattery} = require('playwright/lib/server/chromium/crBrowser');30const chromium = require('playwright').chromium;31const browser = await chromium.launch();32const context = await browser.newContext();33const page = await context.newPage();34const battery = await readBattery(page);35console.log(battery);36const {readBattery} = require('playwright/lib/server/chromium/crBrowser');37const chromium = require('playwright').chromium;38const browser = await chromium.launch();39const context = await browser.newContext();40const page = await context.newPage();41const battery = await readBattery(page);42console.log(battery);43const {readBattery} = require('playwright/lib/server/chromium/crBrowser');44const chromium = require('playwright').chromium;
Using AI Code Generation
1const { readBattery } = require('playwright/lib/server/deviceDescriptors');2const path = require('path');3(async () => {4 const battery = await readBattery(path.join(__dirname, 'battery.json'));5 console.log(battery);6})();7{8}9const { chromium } = require('playwright');10(async () => {11 const browser = await chromium.launch();12 const context = await browser.newContext({13 battery: {14 }15 });16 const page = await context.newPage();17 await browser.close();18})();19const { chromium } = require('playwright');20(async () => {21 const browser = await chromium.launch();22 const context = await browser.newContext({23 ...require('./deviceDescriptor.json')24 });25 const page = await context.newPage();26 await browser.close();27})();
Using AI Code Generation
1const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');2console.log(readBattery());3const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');4console.log(readBattery());5const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');6console.log(readBattery());7const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');8console.log(readBattery());9const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');10console.log(readBattery());11const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');12console.log(readBattery());13const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');14console.log(readBattery());15const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');16console.log(readBattery());17const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');18console.log(readBattery());19const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');20console.log(readBattery());21const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');22console.log(readBattery());23const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');24console.log(readBattery());25const { readBattery } = require('playwright/lib/server/supplements/deviceDescriptors/deviceDescriptors');26console.log(readBattery());27const { read
Using AI Code Generation
1const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');2const battery = await readBattery();3console.log(battery);4const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');5const battery = await readBattery();6console.log(battery);7const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');8const battery = await readBattery();9console.log(battery);10const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');11const battery = await readBattery();12console.log(battery);13const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');14const battery = await readBattery();15console.log(battery);16const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');17const battery = await readBattery();18console.log(battery);19const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');20const battery = await readBattery();21console.log(battery);22const { readBattery } = require('playwright/lib/server/ios/iosDeviceDescriptors');23const battery = await readBattery();24console.log(battery);
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