Javascript JQuery chaining

问题

Let's say we have :

$("p")[0].innerHTML;

and

$("p").html();

In the above examples, we have the same result. So I was wondering how can JQuery return both the nodelist and itself to allow chaining ?

回答1:

So I was wondering how can JQuery return both the nodelist and itself to allow chaining ?

It doesn't.

It only returns itself (which it an object).

That object has a property called 0 which contains the first element in the array of elements. It also has a property called html which contains a function.

回答2:

that is called fluent syntax. each function returns the object it is given. something like

function f(obj){
    doSomething(obj);
    return obj; 
} 

来源：https://stackoverflow.com/questions/34920816/javascript-jquery-chaining