node.js - JavaScript self-executing function problem, please give me some advice

Question

I asked this question once before but did not get the result. Maybe my description was not clear enough. Now I have reorganized my thoughts. The details are as follows:

function demo(){
    // 各种实现
}
demo();    // 我希望它默认就执行一次，所以就这么调用了。

窗口事件：
$(window).resize(function(){
    demo();    // 这里也需要根据条件调用demo函数
});

The question is, is there a way to make the demo execute automatically for the first time? And then it can be called elsewhere? How to optimize such a code body, exclude: arguments.callee, please give me some advice... Thank you in advance.

Answer 1

demo=(function(){
    temp()    // 默认就执行一次
    return temp
})()

function temp(){
 // 各种实现
}

窗口事件：
$(window).resize(function(){
    demo();    // 这里也需要根据条件调用demo函数
});

I don’t know if this meets the requirements of the original poster

Answer 2

There are many ways to achieve it. Both anonymous functions and self-executing functions are acceptable. Please refer to the following:

var demo = function(){
    var innerFunc = function(){
    
    }
    innerFunc();
    return innerFunc;
}

$(window).resize(function(){
});

Answer 3

Does the original poster mean that you want to execute an anonymous function by yourself, and then want to call this anonymous function from another place?

Answer 4

There is nothing wrong with the way you write now

Answer 5

The automatically running js is in the form of (function is written here)(). You can also call it once in the window.onload event