JavaScript scripts can be created in any text editor, such as Notepad and WordPad, but must be saved with a ".js" extension to be functional. Create a new text file and name it "timer.js." ...

The AMP Project team posted, “With ‘amp-script’, custom #JS can operate within AMP Documents,” and included a video showing it in practice. JavaScript is coming to AMP!

Domain registrar GoDaddy is injecting JavaScript into US customer websites that could impact the overall performance of the website or even render it inoperable.