Question

142

rated 0 times [ 143] [ 1] / answers: 1 / hits: 57146 / 13 Years ago, tue, may 10, 2011, 12:00:00

Does anyone know an easy way to change a file extension in Javascript?

For example, I have a variable with first.docx but I need to change it to first.html.

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answered 13 Years ago tatianah · Accepted Answer

This will change the string containing the file name;

let file = "first.docx";



file = file.substr(0, file.lastIndexOf(".")) + ".htm";

For situations where there may not be an extension:

let pos = file.lastIndexOf(".");

file = file.substr(0, pos < 0 ? file.length : pos) + ".htm";