What does init mean in JavaScript

In JavaScript, init means "initialization"; the specific init() function can be used to initialize the entire web page, in which case the function can be called from the "document.ready" or onload processing, The syntax is "init:function(parameter){js statement}".

The operating environment of this tutorial: Windows 10 system, JavaScript version 1.8.5, Dell G3 computer.

#What does init mean in JavaScript

The word "init" means beginning in English.

When programming, it means "initialization", which is what is to be executed at the beginning of a program.

JavaScript does not have a built-in init() function, that is, it is not part of the language. However, it is not uncommon for individual programmers to create their own init() function to do the initialization work ( In many languages).

A specific init() function can be used to initialize the entire web page, in which case it may be called from document.ready or onload processing, or it may be to initialize a specific type Object, or...well, you name it.

Exactly what any given init() does really depends on what the person writing it needs it to do. Certain types of code don't require any initialization .

init is a custom method name. Literally understood, it is generally used to initialize page variables. The meaning of your code above is to execute the initialization method after the current web page is loaded (when the browser finishes opening a web page, the onload method of the window object will be triggered, and the code above will execute the initialization method named init).

In fact, the following writing method is also possible, so that it is easier for you to understand (also called anonymous method, the so-called anonymous method does not have a method name.):

<script language="javascript" type="text/javascript">
window.onload = init(){
var TestStrA = "abc";
var TestStrB = "def";
var TestStrC = TestStrA + TestStrB;
alert(TestStrC);
}
</script>

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