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Promise.resolve的參數(shù)是thenable對(duì)象時(shí)

Promise.resolve的參數(shù)是thenable對(duì)象時(shí)

慕妹3146593 2019-01-29 23:19:12
http://es6.ruanyifeng.com/#do...這個(gè)是阮一峰老師關(guān)于Promise.resolve()參數(shù)的解讀,其中參數(shù)是thenable對(duì)象時(shí),Promise.resolve方法會(huì)將這個(gè)對(duì)象轉(zhuǎn)為 Promise 對(duì)象,然后就立即執(zhí)行thenable對(duì)象的then方法。問(wèn)題來(lái)了:new Promise(resolve => {resolve(1);Promise.resolve({    then: function(resolve, reject){        console.log(2);         resolve(3)     } }).then(t => console.log(t))console.log(4);}).then(t => console.log(t));console.log(5);控制臺(tái)輸出:4 5 2 1 3下面按照最開(kāi)始的理解,將上述代碼進(jìn)行轉(zhuǎn)換new Promise(resolve => {resolve(1);new Promise(resolve=>{    console.log(2);     resolve(3) }).then((t) => console.log(t));console.log(4);}).then(t => console.log(t));console.log(5);控制臺(tái)輸出 2 4 5 3 1順序不一樣。。我很崩潰 求解答
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