javascript - How does promise work?

Question

p.then( function(){
    p.then( function(){
        console.log( "C" );
    } );
    console.log( "A" );
} );
p.then( function(){
    console.log( "B" );
} );

What does a task queue look like?

I don’t need the results, I just want to know the operating mechanism

Answer 1

Event loop mechanism, I think this article is very well written
http://www.jianshu.com/p/12b9...