Commonly used anonymous functions

Anonymous function

Anonymous function refers to a function without a name. Anonymous means that there is no name. If you write it directly, an error will be reported. There is no way to use it. There is no function defined. .

So, anonymous functions must be used in combination.

Usage 1, assign a value to a variable/object attribute (register event), and call it through the variable.

2, self-executing, self-calling.

3, passed as a parameter, parameter: function

；(function(){
console.log("呵呵");
})()；

//Self-calling function, self-executing function: function declaration and function call together. It is customary to add a semicolon before

to prevent global variable pollution

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