Access external JavaScript library file from widget server script

[Ken Raeside2]

Hi,

I'd like to access custom library of JavaScript functions from the Server script in a widget. 

Is it possible to make an external JS library available to a widget? If so, how would the file be added to ServiceNow
and referenced from a widget?

Thanks,

Ken

[-O-]

The library should be defined as a Script Include. Referencing whatever is in the library can be done in two ways: naming the script include the same as the called function or constructor in that library, or by calling

gs.include('<Script Include name>');

after which whatever is in the Script Include is loaded and executed.

So if one has a library that is a function called (say) doSomething, one can create a Script Include called doSomething in-which the function with the same name is defined. Then one can just call that function from a widget's Server script. The system will auto-magically detect that the Script Include should be loaded and executed - I guess - just in time.

Or one can define the same function (doSomething) in a Script Include called (say) Library ABC. The one must first do the API call mentioned above and can use the defined function afterwards:

gs.include('Library ABC');
doSomething();

The limitation of the 2nd method is that only Script Include from the same scopes are loaded.

[-O-]

It seems the scoped version of the API is documented too.

[Ken Raeside2]

Thanks János.

Ken

[-O-]

You're welcome 🙂