關於 promise.then is not a function ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. Promise.then is not a function error only on server - Pretag

Promise.then is not a function, Stack Overflow Public questions & answers ,I am running the below code on local which is working fine but on ...

#12. How to Fix “Promise resolver undefined is not a function” in ...

Fixing “Promise resolver undefined is not a function” ... When using promises in Node.js or JavaScript, you may create promise instances yourself ...

#13. Understanding JavaScript Promises - Nodejs.dev

The created promise will eventually end in a resolved state, or in a rejected state, calling the respective callback functions (passed to then and catch ) ...

#14. 別這樣使用Promise. 聲明

... 的foo()所回傳的promise呢？ Promise.resolve(value)會回傳一個Promise.then… ... new Promise( function(resolve, reject){ firstStep() .then( ...

#15. 然後咧？ ES6 Promise 的奇技淫巧 - 叡揚資訊

有趣的是，按Promise/A+ 規格2.2.7 小節， then 的參數（也就是onFulfilled ... function add(pa, pb) { return pa.then(a => pb.then(b => a + b)); ...

#16. How JavaScript promises actually work from the inside out

So in the above function, then is creating new promise and assigning ... If the arguments supplied are not functions, they must be ignored.

#17. Resolving the JavaScript Promise Error "TypeError: Cannot ...

The response is then parsed into a JSON. This function is expected to return a Promise that should resolve to JSON data.

#18. Promise - The Modern JavaScript Tutorial

let promise = new Promise(function(resolve, reject) { // not taking our ... The first argument of .then is a function that runs when the ...

#19. TypeError: promise.then(...).then(...).then(...).then(...).catch is ...

In a node js server, i'm using some .then() function on a promise and at the end i placed a .catch() function that for some reason is not ...

#20. 25. Promises for asynchronous programming - Exploring JS

Promises are not always the best choice ... If you chain asynchronous function calls via then() , they are executed sequentially, one at a time:.

#21. 一起幫忙解決難題，拯救IT 人的一天

Promise 生成後可以使用.then方法分別指定resolved與reject的callback function ... }).catch((error) =>{ console.log(error) //ReferenceError: AAA is not defined }).

#22. Promises/A+

Finally, the core Promises/A+ specification does not deal with how to create, ... “promise” is an object or function with a then method whose behavior ...

#23. Access the results of a promise — then • promises

Use the then function to access the eventual result of a promise (or, ... so what it does not do is immediately return the result value of the promise.

#24. Methods of Promise: .all(), .any() , .finally(), .race() - DEV ...

If your node.js version is older than that, the console might show a TypeError: Promise.any is not a function message, so you need to update ...

#25. JQuery Promise Video Play. promise.then not a function

promise.then not a function. I am using jQuery.YoutubeBackground.js to play a background video on my site ...

#26. Q documentation - DevDocs

This method should be used to terminate chains of promises that will not be passed elsewhere. ... promise.then(function (o) { return o[propertyName]; }); ...

#27. jQuery promises: done() and then() are not the same

One of many subtle differences is that there are two ways to chain callbacks to an async functions. The first one is done , which only exists in jQuery: Copy. $ ...

#28. Promise - TypeScript Deep Dive - GitBook

If the callback (cb), and not JSON.parse, throws an error, ... If you return a promise from any function in the chain, .then is only called once the value ...

#29. JavaScript Promises: an introduction - web.dev

Maybe you're not even sure what a "promise" is. You'd shrug, but the weight of ... jqDeferred.then(function(response, statusText, xhrObj) {

#30. Working with Promises | Web | Google Developers

You can schedule that second function by calling .then() and passing in the ... Not all promise-related functions have to return a promise.

#31. Javascript Promise then: How to Use Promise.prototype.then()

If it is not a function, it is internally replaced with a “Thrower” function (it throws an error it received as argument). Return Value. Then() ...

#32. [教學] 如何使用JavaScript Promise 簡化非同步流程

這篇文章將會介紹promise 的resolve 和reject，如何使用then 串接非同步流程以及catch ... function ready() { return new Promise(function(resolve) ...

#33. Promises in Node.js - Stack Abuse

Instead of returning concrete values, these asynchronous functions return a Promise object, which will at some point either be fulfilled or not.

#34. JavaScript Promises: A Tutorial with Examples - Toptal

They are not easy to wrap your head around, it can take a few articles, and a decent ... promise.then(function(value) { // Do something with the 'value' });.

#35. Promises and async/await - ISAAC

The function you pass to finally receives no arguments and it's return value is also not used. you can see the finally call as something that is in between ...

#36. JavaScript Promise finally()

const success = true; function connect() { return new Promise((resolve, reject) => { if (success) resolve(new Connection()); else reject('Could not open the ...

#37. Creating a JavaScript promise from scratch, Part 3 - Human ...

In this example, promise.then() adds a fulfillment handler that ... Store the resolve and reject functions on the PromiseCapability .

#38. deferred.then() | jQuery API Documentation

If the filter function used is null , or not specified, the promise will be resolved or rejected with the same values as the original. Callbacks are executed in ...

#39. Promise.reduce - Bluebird JS

If the reducer function returns a promise, then the result of the promise is ... the callback will not be called and the iterable's single item is returned.

#40. Why we use then() method in JavaScript ? - GeeksforGeeks

The then() method in JavaScript has been defined in the Promise API ... Previously, callback functions were used instead of this function ...

#41. JavaScript Promises - how to (not) use it - ergovia GmbH

It has a return value - a Promise. Promises have a then function. The function expects two parameters - yes, two callback functions. The first ...

#42. Using promise.then(callback, callback) misses errors - byte ...

Exception in success handler goes unnoticed. If the success handler throws exception, then it will not be caught and handled in the rejection handler as one ...

#43. Dojo Deferreds and Promises - Dojo Toolkit Tutorial

// chaining to the result promise rather than // the original deferred to get our new value result.then(function(objs){ var userlist = dom.byId("userlist2"); ...

#44. Promise

In short, promises allow you to interact with a value that may or may not be ... then() takes // two functions as arguments. promise.then(onFulfilled, ...

#45. JavaScript Promise Chain - The art of handling promises

includes('hr')){ throw new Error('You are not allowed to access the HR module.'); } // else resolve as usual }) .then(function(email) { console.

#46. Promise JavaScript API - JavaScripture

The Promise constructor calls executer immediately with the two functions resolve and reject . executor should begin the asynchronous operation. When ...

#47. How to Use promises in JavaScript - Tabnine Academy

This is due to the result of badCalc being a promise object, rather than the numeric result we were hoping to see. Asynchronous functions enable us to work with ...

#48. Fullstack React: Introduction to Promises

A Promise object is simply a wrapper around a value that may or may not be known ... The then() function is called with whatever the return value is of the ...

#49. API Reference - Promises

If the function returns a Promise, the state of that Promise will be used instead of the ... Unlike Promise.prototype.then it does not return a Promise.

#50. JavaScript Promises Tutorial with Angular 7/8 Example

Callback functions are not called immediately but instead when the ... of the promise, you need to call its then() method with a function as ...

#51. q - AngularJS: API

else { reject('Greeting ' + name + ' is not allowed.'); } }, 1000); }); } var promise = asyncGreet('Robin Hood'); promise.then(function(greeting) ...

#52. JavaScript Promises - W3Schools

"Consuming Code" (Must wait for a fulfilled Promise) myPromise.then( function(value) { /* code if successful */ }, function(error) { /* code if some error ...

#53. Passing data between Promise callbacks - 2ality

Async is just syntactic sugar for 'then' with unnamed functions. Any solution to the multiple values problem that works with Promises will work ...

#54. Promises in Node.js: An alternative to callbacks - IBM Developer

It's helpful to think of then not as a function that takes two callbacks ( onFulfilled and onRejected ), but as a function that unwraps the ...

#55. A Challenge Problem for Promise Designers (was: Re: Futures)

var ackP = paymentP ! deposit(10, myPurse);. did not have to change at all. The Q(srcP).then at the beginning of the deposit method will turn a purse ...

#56. AngularJS Promises - The Definitive Guide - dwmkerr.com

Promises are not actually complicated, they're objects that contain ... One useful aspect of promises is that the then function returns the ...

#57. Promise(executor) - Mithril

If the return value of this function is not a Promise, it is used as the value for resolving nextPromise . If the returned value is a Promise, then value of ...

#58. JavaScript Promises 101 - bitsofcode

then () and .catch() together to create a sequence of asynchronous functions. We do this by returning another promise within a success or error ...

#59. How to Ensure that a Function Accepts a Value but not a ...

Then I had another async function bar that would return object. ... So how do we make sure that foo gets passed a value and not a Promise?

#60. Promises in JavaScript – JSManifest

This post will not be going over executing promises using ... so that they allow the callback functions to return a promise, which are then ...

#61. Asynchronous stack traces: why await beats Promise#then()

Compared to using promises directly, not only can async and await make ... while promise.then(X) continues execution of the current function ...

#62. promise - npm

It then demonstrates creating a promise from scratch. ... is a function, then it will be treated like a node.js callback and not parsed on ...

#63. A deep-dive into promise resolution with objects including a ...

Promise resolves with an object including then which is not a function. Let thenAction be then.[[Value]]. If IsCallable(thenAction) is false, ...

#64. Faster async functions and promises - V8 JavaScript engine

Note: If you prefer watching a presentation over reading articles, then enjoy the video below! If not, skip the video and read on.

#65. Using and chaining promises in AngularJS - AirPair

Promises are Javascript objects with then and finally functions: ... $http.get('/my-url').then(function(result) { // Not returning a value. } ...

#66. JavaScript 同步延遲( Promise + setTimeout ) - OXXO.STUDIO

function delay() { return new Promise(function (resolve, reject) { setTimeout(function () { resolve('我是傳下去的值'); }, 1000); }); } delay().then(function ...

#67. Concepts: Using JavaScript Promises - Brightcove

Although it is NOT the purpose of this document to teach you how to ... promiseName.then( // Function call for promise resolved ).catch( ...

#68. JavaScript: Promises and Why Async/Await Wins the Battle

Asynchronous functions are a good and bad thing in JavaScript. ... never transition to any other state, and its value or failure reason will not change.

#69. Node.js Promise Tutorial - Guru99

The callback function just updates one record in our MongoDB database. So what is a promise then? Well, a promise is just an enhancement to ...

#70. Uncaught (in promise) TypeError: n.swapComponent is not a ...

Uncaught (in promise) TypeError: n.swapComponent is not a function at app.js:22 (anonymous) @ app.js:22 Promise.then (async) setPage @ app.js:22 ...

#71. Do you really know the promise of JavaScript? | Develop Paper

new Promise( /* executor */ function(resolve, reject) { . ... If onFulfilled1 Return normal value(not promise)Then the state of P2 changes: ...

#72. promiseUtils | API Reference | ArcGIS API for JavaScript 4.21

Various utilities and convenience functions for working with promises. ... an input function is not simultaneously invoked more than once at a time.

#73. Promise Anti-patterns - Tao of Code

resolve(42); promise.then(function() { doSomethingCool(); });. Not the worst anti-pattern here, but there is definitely a cleaner way - wrap the ' ...

#74. 前端非同步技術之Promise | IT人

注意： IE8 及以下版本會出現 identifier not found 的語法錯誤，可將點標記法改 ... promise.then(function f1(value){ //do sth 1 }).then(function ...

#75. ES6 - Promises - Tutorialspoint

let p = new Promise(function(resolve,reject){ let workDone = true; ... promise completed') } else{ reject('ERROR , work could not be completed') } }) ...

#76. How to solve the "is not a function" error in JavaScript - Flavio ...

I required a library, and then I had to run some code at the root level and I created an immediately-invoked async function:.

#77. JavaScript Promises vs. RxJS Observables | by Daniel Weibel

It is now a regular function (not async ) and it uses then to chain the promises returned by asyncTask (instead of await ).

#78. Async Await in Node.js - How to Master it? - RisingStack blog

Async functions return a Promise by default, so you can rewrite any callback based function to use Promises, then await their resolution. You ...

#79. Improve async programming with JavaScript promises

However, if any of these two arguments are not a function, .then() replaces that argument with a function and continues with ...

#80. A Comparison Of async/await Versus then/catch - Smashing ...

Finally, when returning a Promise inside an async function, you don't need to use await . ... With then , it's not so simple.

#81. Chai Assertions for Promises

doSomethingAsync().then( function (result) { result.should.equal("foo"); ... Chai as Promised does not have any intrinsic support for testing promise ...

#82. JavaScript Promises: a practical guide - Boldare

In this scenario, we handled the first error related to downloading but we did not return any data. The second then() function is supposed ...

#83. Asynchronous Event Handling with Promises - Foster Rentals

As you can see from the timeline, we've not changed the amount of work that needs to be ... The then function will always return an encapsulated promise.

#84. Velo: Working with Promises | Help Center | Wix.com

You can use the then() of a Promise to specify a function that will be run when the Promise resolves. The specified function receives ...

#85. How to check if a Javascript promise has been fulfilled ...

The function expects the promise that needs to be modified, then it will ... The operation represented by the promise has not yet been ...

#86. AngularJS Deferred & Promises- Basic Understanding

When you call a function and you do not know when that function will ... the promise.then(null, errorCallback) where success callback is not ...

#87. Mongoose v6.0.12: Promises

Mongoose queries are not promises. They have a .then() function for co and async/await as a convenience. If you need a fully-fledged promise, use the ...

#88. Keep Your Promises in TypeScript using async/await

The then function actually creates a new Promise that is distinct from ... Also, make sure that you are not using any undeclared variables ...

#89. Promise.then method - Windows app development - Microsoft ...

promise.then(onComplete, onError, onProgress).done( /* Your success and error ... The function to be called if the promise is fulfilled ...

#90. await does not wait for Promise to finish - Salesforce Stack ...

So it's a bit weird. The "waiting" happens within that aync function, not your initial js function. consider this example

#91. 可觀察物件與其它技術的比較 - Angular.tw

subscribe(() => { // observer handles notifications }); subscription.unsubscribe();. 承諾是不可取消的。 Promises are not cancellable. 錯誤處理 ...

#92. How To Return Data From JavaScript Promise - Code Handbook

function getPromise(){ return new Promise(function(resolve ... So, if you return a promise from getResult method it can then be used to wait ...

#93. Using JavaScript Promises - Lightning - Salesforce Developers

You can use ES6 Promises in JavaScript code. ... firstPromise() .then( // resolve handler $A.getCallback(function(result) { return anotherPromise(); } ...

#94. Promise - 3.28 - Ember API Documentation

promise is an object or function with a then method whose behavior conforms to this ... (); }).finally(function(){ // author was either found, or not }); ...

#95. promise.then (Promise) - JavaScript 中文开发手册- 开发者手册

then ( () => { console.log( 'Not called.' ); }, reason => { console.error( 'onRejected function called: ', reason ); });. 在其他情况下，一个 ...

#96. Understanding Promises in JavaScript - Live Code Stream

To put it into easier words, though not technically correct, it's like a function, which would run in parallel, and return its value once it's ...

#97. The Difference Between Promise.all and Promise.race in ...

The Promise object in JavaScript offers a few useful built-in methods, ... new Promise(getGroups), new Promise(getLikedPages) ]; function ...

#98. $q.defer: You're doing it wrong - codelord.net

return $http.get('options.json').then(function(response) { return response.data; }); ... Callbacks are not as fun as promises.