Visual Studio Code Replace multiple files at once

You can also Search and Replace across files. Expand the Search widget to display the Replace text box.

When you type text into the Replace text box, you will see a diff display of the pending changes. You can replace across all files from the Replace text box, replace all in one file or replace a single change.

https://code.visualstudio.com/Docs/editor/codebasics#_search-across-files

• Open the folder containing the files wished to be edited via Visual Studio Code. If not exist, create a folder and fill up it with the files.
• At the top-menu bar Edit - Replace in Files or (On Windows Ctrl + ⇧ + H, On Mac, ⌘ + ⇧ + H).