To disable button using JavaScript:
Step 1. Add onClick attribute with disBtn() function to button
Step 2. Get the specified button using document.getElementById()
Step 3. Set disabled attribute to button
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>wecode101 disable button using JavaScript</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
</head>
<body>
<div class="container">
<div class="col-9 pt-5 mx-auto">
<button type="button" class="btn btn-primary" onClick='disBtn()' id="s-btn">Submit</div>
</div>
</div>
</body>
</html>
JS
Let's look at a couple of ways to disable a button based on the steps above:
Option 1. Set disabled attribute to true on document.getElementById()
function disBtn(){
document.getElementById("s-btn").disabled = true;
}
Option 2. Set disable attribute using setAttribute() method
function disBtn(){
document.getElementById("s-btn").setAttribute('disabled', 'disabled');
}
To remove the disable attribute, set disabled attribute to false on document.getElementById():
document.getElementById("s-btn").disabled = false;