javascript - JS file upload validation, but instant in windows window -


i have form , did validation in js, form not send when user sends sth different .doc/.docx. (cv uploading). want faster. error instantly when file selected, not when button submitted. (in windows window).

how it? it's standard form:

<div class="form-group">                                         <label>your cv</label>                                         <input required type="file" accept="application/msword" class="form-control" name="cv" id="cv" aria-describedby="name" placeholder="select cv file"/>                                     </div>

i've got answer. here's code (isdoc own function):

    function onchange(event) {          var file = $('#file_cv')[0].files[0];          if ( !isdoc(file.name) ) {             alert("please, choose .doc or .docx type.");             document.getelementbyid("file_cv").value=""; } }

now, it's impossible submit form without sending proper file.


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