How to change this pointer in jquery

How to change the point of this in jquery: 1. Use assignment [var that=this;] to change the point of [this] of the nested function; 2. Use the es6 arrow function to change the point of this, the code is [$( 'div').on('click', function()】.

The operating environment of this tutorial: windows10 system, jquery2.2.4, this article applies to all Brand of computer.

The method for jquery to change this pointed to:

Use assignment var that=this; to change the 'this of the nested function ' Point to

Use es6 arrow function to change this point to

tips: For a function that passes parameters such as show (c1, c2) in the above example, use .proxy()There are also several scenarios where parameters are passed according to requirements, such as:            

1. .proxy(show, document, c1, c2) // -- > After adding (), call

2. .proxy( show, document )( c1, c2 ) // --> This is the direct call

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