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Whenever I attempt to use the '.includes()' method on string in ThingWorx composer, I always get an error saying that the .includes method can not be found on the object. I even log the type of the variable that I am trying to edit, just to make sure it is in fact a string. And I still can not get around this.

Here's an example of what I'm talking about:

var myString = 'I am trying to debug some crazy ThingWorx issues';

var myBoolean = myString.includes('ThingWorx');

*the above code will throw the error:

'TypeError: Cannot find function includes in object I am trying to debug some crazy ThingWorx issues. (GetProcessPartID#22)]'

But if I log 'typeof myString', it will log 'string'.

What gives?!