Skip to main content

Javascript File Size Validation Example

Javascript File Size Validation Example

Hi Dev,

Today, i will learn how to check file size validation using Javascript. we will check file size validation using Javascript. I can check file size validation using Javascript.Now, we get the file size on the image change event and after.

I will check the file size, if file size greater than 2mb then it will return the error messages otherwise return the success message.ill explain to you how to check file (Image) size validation before upload the file using Javascript.

solution

function OnFileValidation() {
    var image = document.getElementById("image");
    if (typeof (image.files) != "undefined") {
        var size = parseFloat(image.files[0].size / (1024 * 1024)).toFixed(2); 
        if(size > 2) {
            alert('Please select image size less than 2 MB');
        }else{
            alert('success');
        }
    } else {
        alert("This browser does not support HTML5.");
    }
}

So you can see here our example.

Example

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Javascript File Size Validation  Example</title>
    <meta charset="utf-8">
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css">
</head>
<body class="bg-dark">
    <div class="continer">
        <div class="row">
            <div class="col-md-6 offset-md-3">
                <div class="card">
                    <div class="card-header">
                        <h5>File Size Validation Using Javascript Example</h5>
                    </div>
                    <div class="card-body">
                        <form method="post" name="frmAdd" id="frmAdd">
                            <label for="image">Image:</label>
                            <input type="file" name="image" class="form-control" id="image" value="" onchange="OnFileValidation()"><br/>
                            <button type="submit" class="btn btn-success">Submit</button>        
                       </form>
                    </div>
            </div>
        </div>
    </div>
</div>
</body>
<script type="Javascript">
    function OnFileValidation() {
        var image = document.getElementById("image");
        if (typeof (image.files) != "undefined") {
            var size = parseFloat(image.files[0].size / (1024 * 1024)).toFixed(2); 
            if(size > 2) {
                alert('Please select image size less than 2 MB');
            }else{
                alert('success');
            }
        } else {
            alert("This browser does not support HTML5.");
        }
    }
</script>
</html>

It will help you....

Labels:

Comments

Post a Comment

Popular posts from this blog

Laravel Validation Image Example

Hi Guys, Today, I will learn you to create validation image in laravel.we will show example of laravel validation image.The file under validation must be an image (jpg, jpeg, png, bmp, gif, svg, or webp). Here, I will give you full example for simply image validation in laravel bellow. solution $request->validate([ 'file' => 'image' ]); Route : routes/web.php Route::get('form/create','FromController@index'); Route::post('form/store','FromController@store')->name('form.store'); Controller : app/Http/Controllers/BlogController.php <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use Illuminate\Support\Facades\Blade; use App\Models\User; use App\Models\Post; class FromController extends Controller { /** * Write code on Method * * @return response() */ public function create() { return view('form'); } /** * Write code on Method ...
Post a Comment
Read more

Laravel 6 validation required if another field is empty

Hii guys, In this artical, i will give you example of laravel 6 in validation required if another field is empty. We know laravel provide several in-built laravel 6 validation required_without . If you need to add validation rules like required if other field is empty in laravel then you can do it using required_without. I am going to explain you, If you can not enter test (field) value at that time test1 (field) is required. So at that time you can add validation required_without. So, you can use this way: "test1" =>"required_without:test" Example: public function store(Request $request) { $request->validate([ "test" =>"required", "test1" =>"required_without:test" ]); dd("Done!"); } If return validation error otherwise show Done!. It will help you...
Post a Comment
Read more

Laravel Get Headers From Request Example

Hi Dev, In this blog ,I Will learn you how to get header in laravel. I will show example of laravel get headers from request you can easliy laravel get all headers from request. I will explain laravel get all headers. I can blow you can easily get headers from request in laravel this example. Exmaple:1 Here In this exmaple laravel Get headers from request to a header method /** * Show the application dashboard. * * @return \Illuminate\Contracts\Support\Renderable */ public function index(Request $request) { $headers = $request->header('connection'); dd($headers); } Output : "keep-alive" Exmaple:2 Here In this exmaple laravel get headers from request using a request builder to a header method /** * Show the application dashboard. * * @return \Illuminate\Contracts\Support\Renderable */ public function index() { $headers = \Request::header(); dd($headers); } Output : array:13 [ "host" => array:1 [ 0 => "localho...
Post a Comment
Read more