Is a quick and simple and beaultiful plugin to help style your form's file upload inputs using Bootstrap v3.3 - 4.
https://github.com/markusslima/bootstrap-filestyle
http://markusslima.github.io/bootstrap-filestyle/methods.html
https://github.com/markusslima/bootstrap-filestyle
http://markusslima.github.io/bootstrap-filestyle/methods.html
JavaScript:
<input type="file" id="fl">
$("#fl").filestyle({
btnClass: 'btn-primary',
htmlIcon: '[B][/B] ',
text: 'Select File'
});