javascript - get the filename and extension from input type=file

Question

I have a file upload input and when I click the browse button and select the file, I want the filename and extension to appear in two input text boxes (see code sample).

It works correctly with the extension, but the filename also shows the path which gives me the fakepath warning.

I understand why, but what's a good way to do this and just get the filename into that box. I don't need the path.

function getoutput(){      outputfile.value=inputfile.value.split('.')[0];      extension.value=inputfile.value.split('.')[1];}

    <input id='inputfile' type='file' name='inputfile' onChange='getoutput()'><br>      Output Filename <input id='outputfile' type='text' name='outputfile'><br>      Extension <input id='extension' type='text' name='extension'>

Answer 1

This is bit old post...just for info

   var files = event.target.files    var filename = files[0].name    var extension = files[0].type 

In the type you will find the extension for eg: if it is jpeg image then,

extension = image/jpeg 

or if pdf then,

extension = application/pdf 

To obtain the exact value, perform extension.replace(/(.*)\//g, ''). you will get the value.

Answer 2

Use lastIndexOf to get the last \ as an index and use substr to get the remaining string starting from the last index of \

function getFile(filePath) {          return filePath.substr(filePath.lastIndexOf('\\') + 1).split('.')[0];      }        function getoutput() {          outputfile.value = getFile(inputfile.value);          extension.value = inputfile.value.split('.')[1];      }

<input id='inputfile' type='file' name='inputfile' onChange='getoutput()'><br>      Output Filename <input id='outputfile' type='text' name='outputfile'><br>      Extension <input id='extension' type='text' name='extension'>

UPDATE

function getFileNameWithExt(event) {      if (!event || !event.target || !event.target.files || event.target.files.length === 0) {      return;    }      const name = event.target.files[0].name;    const lastDot = name.lastIndexOf('.');      const fileName = name.substring(0, lastDot);    const ext = name.substring(lastDot + 1);      outputfile.value = fileName;    extension.value = ext;      }

<input id='inputfile' type='file' name='inputfile' onChange='getFileNameWithExt(event)'><br>    Output Filename <input id='outputfile' type='text' name='outputfile'><br>    Extension <input id='extension' type='text' name='extension'>