Recent questions tagged Promise

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promise - How to use fetch in TypeScript

I am using window.fetch in Typescript, but I cannot cast the response directly to my custom type: I am hacking my way ... b:Actor = <Actor>a; }) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - using a fetch inside another fetch in javascript

I want to get an api and after that call another one. Is it wisely using a code like this in javascript? fetch ... ('Request failed', error) }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - Wait for Angular 2 to load/resolve model before rendering view/template

In Angular 1.x, UI-Router was my primary tool for this. By returning a promise for "resolve" values, the ... code or accepted answer in it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - What do double brackets mean in javascript and how to access them

Situation I have the following function which uses Promise. var getDefinitions = function() { return new Promise( ... retrieve the value of [[PromiseValue]]. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - Angularjs $q.all

I have implemented the $q.all in angularjs, but I can not make the code work. Here is my code : UploadService ... some problem setting up $q.all in my service. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - Problems inherent to jQuery $.Deferred (jQuery 1.x/2.x)

@Domenic has a very thorough article on the failings of jQuery deferred objects: You're missing the Point of ... .0 alpha jQuery is Promises/A+ compliant. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - How to cancel an $http request in AngularJS?

Given a Ajax request in AngularJS $http.get("/backend/").success(callback); what is the most effective ... (same backend, different parameters for instance). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - how to hit other microservices from a common endpoint in R plumber

Suppose I have 3 microservices named as app1, app2 and total. app1 runs on port 5001 and takes two parameters x ... -to-hit-other-microservices-from-a-common-endpoint-in-r-plumber...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise - How to handle errors using Knex.js

I am using nest.js with knex and try to make error handler for my application. So I can update my data ... /stackoverflow.com/questions/66062736/how-to-handle-errors-using-knex-js...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise then 的回调函数是在什么时候进入微任务队列的？

promise then 的回调函数是在遇到 resolve 语句的时候就被加入微任务队列，还是在遇到 then 语句的时候被加入到微任务队列？在网上查了一些资料，发现有不同的说法：比如在《深入理解ES6》中文版 244 页里是这么说的： ... 加入微任务队列，3 4 都认为是在遇到 then 语句的时候被加入到微任务队列的到底哪一种说法是正确的呢？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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promise then 的回调函数是在什么时候进入微任务队列的？

promise then 的回调函数是在遇到 resolve 语句的时候就被加入微任务队列，还是在遇到 then 语句的时候被加入到微任务队列？在网上查了一些资料，发现有不同的说法：比如在《深入理解ES6》中文版 244 页里是这么说的： ... 加入微任务队列，3 4 都认为是在遇到 then 语句的时候被加入到微任务队列的到底哪一种说法是正确的呢？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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promise 链式调用中，then的第一个(参数)函数中为什么需要手动 return 一个 promise，而不是自动？

疑问0：then的第一个(参数)函数中只有return promise才是最佳实践吗？疑问1（基于疑问0）：是最佳实践的话，设计之初，为什么不将返回值自动转为promise，而无需考虑 ... (newResult)) .then(() => doFourthThing()) .catch(error => console.error(error));...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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promise 同步执行异步请求内附代码写法求教

shopSum(){ return new Promise(resolve=>{ resolve(); this.$post('ord003', { "flag":true }).then(res => { //请求1 }) }) } ... ) .then(activitySum()) .then(orderySum()) 这样写他并没有按照顺序求教...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

1 answer

promise 同步执行异步请求内附代码写法求教

shopSum(){ return new Promise(resolve=>{ resolve(); this.$post('ord003', { "flag":true }).then(res => { //请求1 }) }) } ... ) .then(activitySum()) .then(orderySum()) 这样写他并没有按照顺序求教...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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