Question about working of External javascript

Question

Hi All I had a question regarding the working of an external javascript file Suppose I have an external javascript file and it has a set of functions written in it. I reference this JS file in my HTML page. Now when a user requests for this HTML page what happens with the JS file. Is the function body that is called from the HTML sent with the page markup ? or is the JS file downloaded to the users machine/ loaded in the memory ?? Regards Vipul

Chintan Rathod · Answer

Now whenever the page is loaded  the browser also puts the script helloworld.js in the page. Note that you do not see the script in your source code you just see the include tag. By including the above reference your browser will now download the code stored inside helloworld.js and run it as if it was physically typed onto the page.