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December 29, 2017 03:18
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Bootstrap v4 Beta-2 add filename in custom input file
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| .custom-file, | |
| .custom-file-control, | |
| .custom-file-input { | |
| height: 2.3rem!important; | |
| } | |
| /* add FontAwesome icon for input (optional) */ | |
| .custom-file-control::before { | |
| font-family: 'FontAwesome'; | |
| content: "\f03e"!important; | |
| height: 2.3rem!important; | |
| padding: .4rem 1rem!important; | |
| border-radius: 0!important; | |
| } | |
| .custom-file-name:after { | |
| content: attr(data-content) !important; | |
| position: absolute; | |
| top: 0px; | |
| left: 0px; | |
| overflow: hidden; | |
| padding: 0.35rem .5rem; | |
| } |
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| /** | |
| * Bootstrap v4 Beta-2 add filename in custom input file dinamic and restore default "fake placeholder" in "Event.RESET" | |
| * Based on this issue: @see {https://github.com/twbs/bootstrap/issues/20813} - original as jQuery | |
| */ | |
| let customInputs = document.querySelectorAll('input[type="file"][data-toggle="custom-file"]'); | |
| if ( customInputs.length > 0 ) { | |
| for (let i = 0; i < customInputs.length; i++) { | |
| let input = customInputs[i]; | |
| if ( input.hasAttribute('data-target') ) { | |
| // only accept "id" (don't accept "class") | |
| let targetid = input.getAttribute('data-target'); | |
| let target = document.getElementById(targetid); | |
| if ( !target || !target.getAttribute('data-content') ) { | |
| // next... | |
| continue; | |
| } else { | |
| if ( !target.getAttribute('data-original-content') ) { | |
| target.setAttribute('data-original-content', target.getAttribute('data-content')); | |
| } | |
| // handler Event (per input) | |
| input.addEventListener('change', function(evt) { | |
| // remark variables by "this" input refer | |
| targetid = this.getAttribute('data-target'); | |
| target = document.getElementById(targetid); | |
| // get file name | |
| let filename = evt.target.files[0].name; | |
| if ( !filename || filename === '' ) { | |
| filename = target.getAttribute('data-original-content'); | |
| } | |
| target.setAttribute('data-content', filename); | |
| // trigger "Event.RESET" by form | |
| this.form.addEventListener('reset', function() { | |
| target.setAttribute('data-content', target.getAttribute('data-original-content')); | |
| }, false); | |
| }, false); | |
| } | |
| } | |
| } | |
| } |
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| <!DOCTYPE html> | |
| <html lang="en-US"> | |
| <head> | |
| <title>Upload Form</title> | |
| <meta charset="UTF-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> | |
| <link type="text/css" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"> | |
| <link type="text/css" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"> | |
| </head> | |
| <body> | |
| <form method="post" action="/upload" enctype="multipart/form-data" accept-charset="utf-8"> | |
| <div class="form-row"> | |
| <div class="form-group"> | |
| <label>Image:</label> | |
| <label class="custom-file"> | |
| <input id="image-input" data-toggle="custom-file" data-target="image-upload" type="file" accept="image/*" class="custom-file-input"> | |
| <span id="image-upload" class="custom-file-control custom-file-name rounded-0" data-content="Choose picture"></span> | |
| </label> | |
| </div> | |
| </div> | |
| </form> | |
| </body> | |
| </html> |
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