how to get last extenction from file name javascript code example
Example 1: how to get the extension from filename using javascript
var ext = fileName.substr(fileName.lastIndexOf('.') + 1);
Example 2: 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);