JavaScript Tips and Tricks: JSUtil...

Did you know that your Service-now instance comes complete with a handy-dandy set of commonly used JavaScript utility methods? These are in a script include named "JSUtil", and you can easily use its methods in your scripts.

For example, there's a method named "nil()" (along with "notNil()" that lets you easily test whether a value is null, undefined, or an empty string. You might use it in your own code it like this:

function myFunc(val) {
    if (JSUtil.nil(val))
        return null;
    return 'My prefix: ' + val;
}