jquery - Javascript onChange event not firing in Input type file -


i using javascript file inside 'scripts' folder checking validation such file size uploading image. however, change event not firing. mistake in code? 

var filelogo = "";    $(document).on("change", "#idfilelogo", function(e) {    var file_size = $(this)[0].files[0].size;    if (file_size > 1000141) {      $("#txtfilelogo").attr("placeholder", "upload image");      var message = "image size greater 1mb.";      showerrormesssage(message);      return false;    }    filelogo = $(this).val();    var ext = filelogo.split('.').pop();    if (ext == "x-png" || ext == "jpeg" || ext == "gif" || ext == "jpg") {      $("#txtfilelogo").attr('placeholder', $(this).val().split('\\').pop());    }  });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <input type="text" style="height: 35px !important" id="txtfilelogo" class="form-control input-lg" disabled placeholder="upload image">  <div class="input-group-btn">    <div class="browse btn btn-primary"><i class="glyphicon glyphicon-search"></i> browse<input type="file" accept="image/*" id="idfilelogo" name="fileuploadlogo" class="file"></div>  </div>

you have problem because scripts before html tags , when scripts have been run there no "idfilelogo" tag.

put after html tags or use jquery event insure content has been loaded. example:

    var filelogo = "";     $(document).ready(function() {         $(document).on("change", "#idfilelogo", function(e) {           var file_size = $(this)[0].files[0].size;           if (file_size > 1000141) {             $("#txtfilelogo").attr("placeholder", "upload image");             var message = "image size greater 1mb.";             showerrormesssage(message);             return false;           }           filelogo = $(this).val();           var ext = filelogo.split('.').pop();           if (ext == "x-png" || ext == "jpeg" || ext == "gif" || ext == "jpg") {             $("#txtfilelogo").attr('placeholder', $(this).val().split('\\').pop());           }         });     });

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