Typescript details learning and typescript details Learning

Typescript details learning and typescript details Learning

1. Judge the type of a variable, and use typeof variable = 'array' to look like this. Note that this ''is not a single quotation mark. Remember to use three equal signs.

2. If this is passed in TypeScript and used in the callback function, you should be careful. this is not necessarily pointing to the current class object. If you want to ensure

If you still point to the object, you need to call bind (this) first when passing the method ). or, during callback, do not directly change func (agrs) to func. call (target object, args)

In this case, this in the callback function is passed in: target object