Then return new promise
SpletYou can use Promise.all (spec, MDN) for that: It accepts a bunch of individual promises and gives you back a single promise that is resolved when all of the ones you gave it are … Splet07. feb. 2024 · 通过axios请求数据，将promise中的数据return出外层调用函数去： 其实也就是await的各种用法。 有人问如果不用await怎么办，那就使用回调函数呗 更新示例： 注 …
Then return new promise
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SpletDelivery & Pickup Options - 265 reviews of Crazy Cajun Seafood Restaurant "I am an inlander. I am a city boy. I could not be any less cajun, so this review is a tale of fear, … Splet12. apr. 2024 · return new Promise ( function ( resolve, reject) { fs. readFile (fileName, function ( err, data) { if (err) { return reject (err); } console. log (vars + data. toString ()) return resolve (data. toString ()) }) }); } asyncReadFile ( 1111, 'txt') . then ( function ( value) { // doSome return asyncReadFile ( 2222, value); })
Splet如果then回调函数里 return的是 另一个promise 实例 该then后面的回调函数 会等待这个promise实例执行状态改变后才会执行 tcatch返回的也是fulfilled 状态的promise实例 … SpletUpvote all submissions! Enjoy your free karma! I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. 1. [deleted] • 4 hr. ago. Fit-Reputation-9689 • 4 hr. ago.
Splet先看看 async/await 的语法 async 函数返回一个 Promise 对象 async 函数内部 return 返回的值。会成为 then 方法回调函数的参数 ... { const result = await getInfo() … Splet20. dec. 2024 · then () は、 Promise のインスタンスの状態が fulfilled となったときに実行する関数を登録できる インスタンスメソッドです。 以下のような構文となっています …
Splet17. feb. 2024 · As illustrated in Approach-1 first declare a new promise and then wrap your result in setTimeout () method and provide a time-delay of 1000ms (approximately …
Spletit yeah sick and tired everyday I'll be living the same I'm trying to do it trying to get it and do it again I'm staying driven for my dream when I'm switching my lanes looking in my you can … craft store ocean keysSplet31. jan. 2024 · First off, you should be avoiding the promise anti-pattern that wraps a new promise around other functions that already return promises. If you're doing that, then … craft store orange ctSpletHere is how to use a Promise: myPromise.then( function(value) { /* code if successful */ }, function(error) { /* code if some error */ } ); Promise.then () takes two arguments, a … craft store north vancouverSplet209 Likes, 4 Comments - 임희진 푰풎 푯풆풆풋풊풏 (@heejinthesnap._) on Instagram: "exclusive heejin personal tour for @kb_buses this fella from New Zealand ... dixie chopper lawn mower paSpletpred toliko urami: 18 · By giving an in-universe explanation as to why the Elder was played by a different actor in Chapter 4, the latest entry in the John Wick franchise changed the … craft store olathe ksSplet21. mar. 2024 · Promise ()の引数には関数を設定し、その中で行いたい処理を記述するのが一般的です。 例えば、日付を取得するPromise処理は次のようになります。 var result … dixie chopper lawn mower priceSplet好记性不如烂笔头，最有效的还是上代码。 function p1() { return new Promise((resolve, reject) => { setTimeout(() => { resolve('p1') }, 2000 ... craft storenew york ny
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