Detect Battery Status using HTML, CSS & JavaScript

Detect Battery Status using HTML, CSS & JavaScript

Detect Battery Status using HTML, CSS & JavaScript


Hello everyone. Welcome to today’s tutorial on Codewithrandom. We’ll learn how to make Detect Battery Status which will help us to see the battery status of our device and it is connected to the API which shows that the browser has battery detection status or not. This project will is good for beginners and help them to build their front-end development skills. In Today’s session, We will use HTML, CSS, and JavaScript to complete this Detect Battery Status Project.

Detect Battery Status Javascript

Project Description

Step 1
The HTML (Hypertext Markup Language) will help us to create the structure for the list with some necessary attributes and elements to make Detect Battery Status Project.

Step 2
Then we will use CSS (Cascading Stylesheet) which will help us to style or design the project with suitable padding and alignment in the Detect Battery Status Project.

Step 3
At last we will use JS (JavaScript) which will add a logic to make the Detect Battery Status Project responsive from the user end.

I hope you have got an idea about the project.

HTML Code for Detect Battery Status

First we’ll start with creating the structure of the Detect Battery Status project for that as you can see the above code we have used all the necessary elements & attributes to setup the structure. Let us know code the CSS part to add styling and aligned the tags.

<html lang="en">
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Detect Battery Status</title>
    <!-- Google Fonts -->
    <!-- Stylesheet -->
    <link rel="stylesheet" href="style.css" />
    <div class="container">
      <div id="battery">
        <div id="charge"></div>
        <div id="charge-level"></div>
      <div id="charging-time"></div>
    <script src="script.js"></script>

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CSS Code for Detect Battery Status

Second comes the CSS code in which we have styled for the structure we have padded as well as aligned the Detect Battery Status project so that it is properly situated and doesn’t get messy with suitable CSS elements. Now we have created the structure using HTML and styled the webpage using CSS its time to add the functionality using JavaScript in this project.

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Roboto Mono", monospace;
.container {
  position: absolute;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
#battery {
  box-sizing: content-box;
  height: 7.8em;
  width: 17.5em;
  border: 0.6em solid #246aed;
  margin: auto;
  border-radius: 0.6em;
  position: relative;
  display: grid;
  place-items: center;
#battery:before {
  position: absolute;
  content: "";
  height: 5em;
  width: 1.1em;
  background-color: #246aed;
  margin: auto;
  top: 0;
  bottom: 0;
  right: -1.6em;
  border-radius: 0 0.3em 0.3em 0;
#charge {
  position: absolute;
  height: 6.5em;
  width: 16.25em;
  background-color: #246aed;
  top: 0.6em;
  left: 0.6em;
#charge-level {
  position: absolute;
  font-size: 3em;
  font-weight: 500;
#charging-time {
  text-align: center;
  font-size: 1.7em;
  margin-top: 1.4em;
.active {
  animation: charge-animation 3s infinite linear;
@keyframes charge-animation {
  0% {
    width: 0;
  100% {
    width: 16.25em;

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JavaScript Code for Detect Battery Status

Last stage of the project the JavaScript in which we have added the logical and coded as per the requirement with some conditions. Let us see the Final Output of the project Detect Battery Status using HTML, CSS & JavaScript (Source Code).

const chargeLevel = document.getElementById("charge-level");
const charge = document.getElementById("charge");
const chargingTimeRef = document.getElementById("charging-time");

window.onload = () => {
  //For browsers that don't support the battery status API
  if (!navigator.getBattery) {
    alert("Battery Status Api Is Not Supported In Your Browser");
    return false;

navigator.getBattery().then((battery) => {
  function updateAllBatteryInfo() {

  //When the charging status changes
  battery.addEventListener("chargingchange", () => {

  //When the Battery Levvel Changes
  battery.addEventListener("levelchange", () => {

  function updateChargingInfo() {
    if (battery.charging) {
      chargingTimeRef.innerText = "";
    } else {

      //Display time left to discharge only when it is a integer value i.e not infinity
      if (parseInt(battery.dischargingTime)) {
        let hr = parseInt(battery.dischargingTime / 3600);
        let min = parseInt(battery.dischargingTime / 60 - hr * 60);
        chargingTimeRef.innerText = `${hr}hr ${min}mins remaining`;

  //Updating battery level
  function updateLevelInfo() {
    let batteryLevel = `${parseInt(battery.level * 100)}%`; = batteryLevel;
    chargeLevel.textContent = batteryLevel;

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Live Preview of Detect Battery Status using HTML, CSS & JavaScript

See the Pen
Detect Battery Status
by Harsh Sawant (@harshh9)
on CodePen.

We have Successfully created our Detect Battery Status using HTML, CSS & JavaScript (Source Code). You can use this project for your personal needs and the respective lines of code are given with the code pen link mentioned above.

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Code Idea – codingartist

Written By – Harsh Sawant

Code By – @harshh9

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