异步API

2024-10-12 18:07:31

　　整合到一起，作为参考：

    //2 5 3 4 1

    //2 5 3 1 4

    var img = new Image();

    img.src = '.';

    img.onerror = function() {

        console.log(1);

    };

    console.log(2);

    Promise.resolve().then(() => console.log(3));

    setTimeout(() => console.log(4), 0);

    Promise.resolve(console.log(5));

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