is.function and is.class

[William Weithers]

When attempting to use is.function and / or is.class I am getting a x is not a function error. I then noticed that those two methods / functions had underscores (_) appended to their name.

Is that to mean that we should no longer be using them? If not, should the README be changed to reflect their name change?

[Sindre Sorhus]

Are you using TypeScript or plain JavaScript? They should only have underscore appended in TS to work around those words being reserved there.

[William Weithers]

Plain JavaScript.

[Brandon Smith]

@jsneko please provide the version you're using and a code snippet if this is still an issue. Source below shows where is.function and is.class should be available to plain JS:

is/source/index.ts

Lines 629 to 650 in d528545

 Object.defineProperties(is, { 
 	class: { 
 		value: is.class_ 
 	}, 
 	function: { 
 		value: is.function_ 
 	}, 
 	null: { 
 		value: is.null_ 
 	} 
 }); 
 Object.defineProperties(assert, { 
 	class: { 
 		value: assert.class_ 
 	}, 
 	function: { 
 		value: assert.function_ 
 	}, 
 	null: { 
 		value: assert.null_ 
 	} 
 });