Posted By
Bajarangi soft ,
Posted On 30-09-2020
Window atob() method
The atob() method decodes a base-64 encoded string.
Syntax and Usage
window.atob(encodedStr)
Parameter Values
Parameter Description encodedStr Required. The string which has been encoded by the btoa() method
Return Value: A String, representing the decoded string
Example(1)
<button class="btn btn-info" onclick="atob_function()">atob</button>
<h4 id="demo1"></h4>
<script>
function atob_function() {
var str = "Hello World! Welcome to Bajarangisoft To Learn More About JAVASCRIPT";
var enc = window.btoa(str);
var dec = window.atob(enc);
var res = "Encoded String: " + enc + "<br>" + "Decoded String: " + dec;
document.getElementById("demo1").innerHTML = res;
}
</script>
Window btoa() Method
The btoa() method encodes a string in base-64.
This method uses the "A-Z", "a-z", "0-9", "+", "/" and "=" characters to encode the string.
Syntax and Usage
window.btoa(str)
Parameter Description str Required.The string to be encoded
Return Value: A String, representing the base-64 encoded string
<button class="btn btn-info" onclick="btoa_function()">btoa</button>
<h4 id="demo2"></h4>
<script>
function btoa_function() {
var str = "Hello World! Welcome to Bajarangisoft To Learn More About JAVASCRIPT";
var enc = window.btoa(str);
var res = "Encoded String: " + enc;
document.getElementById("demo2").innerHTML = "The original string: " + str + "<br>" + res;
}
</script>
In above example when you click the button it will encode a string in base-64.
Complete Code For Window AtoB and BtoA Methods In JavaScript
<!DOCTYPE html>
<html>
<head>
<title> Use Window AtoB and BtoA Methods In JavaScript</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
</head>
<style>
h1 {
color: red;
}
</style>
<body>
<div class="container">
<br>
<div class="text-center">
<h1>Use Window AtoB and BtoA Methods In JavaScript</h1>
</div>
<br>
<div class="well">
<button class="btn btn-info" onclick="atob_function()">atob</button>
<h2>Welcome to Bajarangisoft To Learn More About JAVASCRIPT</h2>
<h4 id="demo1"></h4>
<button class="btn btn-info" onclick="btoa_function()">btoa</button>
<h4 id="demo2"></h4>
</div>
</body>
</html>
<button class="btn btn-info" onclick="btoa_function()">btoa</button>
<h4 id="demo2"></h4>
<script>
function atob_function() {
var str = "Hello World! Welcome to Bajarangisoft To Learn More About JAVASCRIPT";
var enc = window.btoa(str);
var dec = window.atob(enc);
var res = "Encoded String: " + enc + "<br>" + "Decoded String: " + dec;
document.getElementById("demo1").innerHTML = res;
}
function btoa_function() {
var str = "Hello World! Welcome to Bajarangisoft To Learn More About JAVASCRIPT";
var enc = window.btoa(str);
var res = "Encoded String: " + enc;
document.getElementById("demo2").innerHTML = "The original string: " + str + "<br>" + res;
}
</script>