How to debug (only) JavaScript in Visual Studio?

First open Visual studio ..select your project in solution explorer..Right click and choose option "browse with" then set IE as default browser.

Now open IE ..go to
Tools >> Internet option >> Advance>> uncheck the checkbox having "Disable Script Debugging (Internet Explorer). and then click Apply and OK and you are done ..

Now you can set breakpoints in your JS file and then hit the debug button in VS..

EDIT:- For asp.net web application right click on the page which is your startup page(say default.aspx) and perform the same steps. :)

Yes you can put the break-point on client side page in Visual studio

First Put the debugger in java-script code and run the page in browser

debugger

After that open your page in browser and view the inspect element you see the following view

The debugger should automatically attach to the browser with Visual Studio 2012. You can use the debugger keyword to halt at a certain point in the application or use the breakpoints directly inside VS.

You can also detatch the default debugger in Visual Studio and use the Developer Tools which come pre loaded with Internet Explorer or FireBug etc.

To do this goto Visual Studio -> Debug -> Detatch All and then click Start debugging in Internet Explorer. You can then set breakpoints at this level.