Posted By
Bajarangi soft ,
Posted On 06-10-2020
Step 1: Create index.html and implement below code.
<form >
<input type='file' class="form-control"/>
<br><img id="myImg" src="../image/demo5.jpg" alt="your image" height=300 width=500>
<br><br><input type="submit" class="btn btn-success" value="submit"/>
</form>
window.addEventListener('load', function() {
document.querySelector('input[type="file"]').addEventListener('change', function() {
if (this.files && this.files[0]) {
var img = document.querySelector('img'); // $('img')[0]
img.src = URL.createObjectURL(this.files[0]); // set src to blob url
img.onload = imageIsLoaded;
}
});
});
function imageIsLoaded() {
alert(this.src); // blob url
// update width and height ...
}
Complete Code For Previewing Image Before Submitting Form In JavaScript
<!DOCTYPE html>
<html>
<head>
<title>How To Preview Image Before Submitting Form 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>
</style>
<body>
<div class="container">
<br>
<div class="text-center">
<h1 style="color: tomato">How To Preview Image Before Submitting Form In JavaScript</h1>
</div>
<div class="well">
<form>
<input type='file' class="form-control"/>
<br><img id="myImg" src="../image/demo5.jpg" alt="your image" height=300 width=500>
<br><br><input type="submit" class="btn btn-success" value="submit"/>
</form>
</div>
<script>
window.addEventListener('load', function () {
document.querySelector('input[type="file"]').addEventListener('change', function () {
if (this.files && this.files[0]) {
var img = document.querySelector('img'); // $('img')[0]
img.src = URL.createObjectURL(this.files[0]); // set src to blob url
img.onload = imageIsLoaded;
}
});
});
function imageIsLoaded() {
alert(this.src); // blob url
// update width and height ...
}
</script>
</div>
</body>
</html>