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javascript find file extension from string

var ext =  fileName.split('.').pop();
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how to get the extension from filename using javascript

var ext = fileName.substr(fileName.lastIndexOf('.') + 1);
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JavaScript - How to get the extension of a filename

let filename = "index.js";
let extension = filename.split(".").pop();

console.log(extension); // "js"
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javascript get file extension from string

// Use the lastIndexOf method to find the last period in the string, and get the part of the string after that:

var ext = fileName.substr(fileName.lastIndexOf('.') + 1);
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get file extention js

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;
  
}
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how to check the extension of a file in javascript

return filename.split('.').pop();
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how to get file extension in javascript

var fileName = "myDocument.pdf";
var fileExtension = fileName.split('.').pop(); //"pdf"
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Get file extension in javascript

file.originalname.match(/..*$/)[0]
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