Check online status javascript

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8 Answers

checkjavascriptstatusonline
90%

The next thing we will do is add the event listeners for the online and offline events so that we can check when the users' network status changes,,Now when we go into our app we will get live feedback when the user changes their network status

Example_snippet/controller/utility/_check.js/ <!DOCTYPE html> <html lang="en. . .
<!DOCTYPE html>
<html lang="en">

<head>
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>Network Checker</title>
   <link rel="stylesheet" href="style.css" />
</head>

<body>
   <div class="app">
      <h1 class="status">Hello</h1>
   </div>
   <script src="app.js"></script>
</body>

</html>
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How to detect the Internet connection is offline in JavaScript?,You can determine that the connection is lost by making failed XHR requests,, Is a mathematical statement uniquely determined by all of its necessary conditions? , Outdated Answers: accepted answer is now unpinned on Stack Overflow

Example_snippet/controller/utility/_check.js/ console.log('Initially ' + (wi. . .
console.log('Initially ' + (window.navigator.onLine ? 'on' : 'off') + 'line');

window.addEventListener('online', () => console.log('Became online'));
window.addEventListener('offline', () => console.log('Became offline'));

document.getElementById('statusCheck').addEventListener('click', () => console.log('window.navigator.onLine is ' + window.navigator.onLine));
Step 2 continued with <button id="statusCheck">Click. . .
<button id="statusCheck">Click to check the <tt>window.navigator.onLine</tt> property</button><br /><br />
Check the console below for results:
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72%

To see changes in the network state, use addEventListener to listen for the events on window,online and window

Example_snippet/controller/utility/_check.js/ online = window.navigator.onLi. . .
online = window.navigator.onLine;
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The alert message will return true if the browser is online and false if its offline,,This is how you can use this property

Example_snippet/controller/utility/_check.js/ <script> let status = navi. . .
<script>
   let status = navigator.onLine;
   alert(status);

   //  or, you can use
   // var status = navigator.onLine;
   // alert (status);
</script>
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Articles related to JavaScript,,Coding tutorials and news

Example_snippet/controller/utility/_check.js/ online. . .
online
Step 2 continued with navigator. . .
navigator
Step 3 continued with true. . .
true
Step 4 continued with false. . .
false
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Now let's make a nice looking webpage using the Javascript code used above to show if the user is offline or online,,So in this tutorial, we will see some of the ways to detect when a user is offline and when the user comes back online to show some message on the website to inform the user about it

Example_snippet/controller/utility/_javascript.js/ window.addEventListener('load'. . .
window.addEventListener('load', function(e) {
   if (navigator.onLine) {
      console.log('We\'re online!');
   } else {
      console.log('We\'re offline...');
   }
}, false);
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Learn how to detect whether the browser is online or offline with JavaScript,,Read more about the Navigator Object in our JavaScript Navigator Tutorial

Example_snippet/controller/utility/_javascript.js/ onLine. . .
onLine
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It will return a boolean true or false depending on the internet status, If the browser is connected to the internet, it will return the boolean true value and if not then it will return the boolean false value

Example_snippet/controller/utility/_javascript.js/ window.navigator.onLine. . .
window.navigator.onLine
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