Get File Name with JavaScript

Web Dev
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In this article, I will introduce how to get file name with JavaScript.

Get the local file name

A new "File API" has been added from HTML5 to work with local files.
With this API, you can open a local file or send it to a server with very simple code.

Get the file name of the access destination

Get the information by specifying "file" in the type attribute of the input tag as shown below.

<input id="file" name="file" type="file" />

The information that can be obtained is:

  • name : file name
  • type : MIME type of file
  • size : file size
  • lastModifiedDate : file modification date

If you want to get the contents of the file, use "FileReader API".

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Sample Code

Below is the sample code to get the information of the specified file.

HTML

<input id="file" name="file" type="file" />

JavaScript

window.addEventListener('DOMContentLoaded', function() {
  document.querySelector("#file").addEventListener('change', function(e) {

    // Check if the browser can use the File API
    if (window.File) {
      // Get information about the specified file
      var input = document.querySelector('#file').files[0];

      // file name
      console.log(input.name);

      // MIME type of file
      console.log(input.type);

      // file size
      console.log(input.size);

      // file modification date
      console.log(input.lastModifiedDate);
    }
  }, true);
});