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Showing posts with the label Es6 Promise

How To Create A Function That Returns An Existing Promise Instead Of New Promise?

JavaScript/Promise experts, I hope you can help me, because I don't understand how I can create… Read more How To Create A Function That Returns An Existing Promise Instead Of New Promise?

How Do I Handle Multiple Browser Scripts Making The Same Calls To The Back-end Service

I have a web page where different parts of it all need the same back-end data. Each is isolated, s… Read more How Do I Handle Multiple Browser Scripts Making The Same Calls To The Back-end Service

Nodejs Process Crashed Without An Exception

I write a log entry to the log when an uncaught exception occurred in my nodejs app. process.on(… Read more Nodejs Process Crashed Without An Exception

Weird Behavior With Promise Throwing "unhandled Promise Rejection" Error

When I run this code using Node, it throws an Unhandled promise rejection error in the console (eve… Read more Weird Behavior With Promise Throwing "unhandled Promise Rejection" Error

Es6 Giving Syntaxerror: Unexpected Token )

Here is my Node.js script: pDownload('http://serv/file', 'localfile') .then( ()=&… Read more Es6 Giving Syntaxerror: Unexpected Token )

Synchronous Or Sequential Fetch In Service Worker

I need to send a series of PUT & POST requests from a Service Worker. The order in which they&#… Read more Synchronous Or Sequential Fetch In Service Worker

Js Promises: If A Handler In A `then` Block Returns A Value Vs Returning A Resolved Promise, Does The `then` Block Handle It The Same Way?

Say I have a function that returns a resolved promise like this: let a = () => {return new Promi… Read more Js Promises: If A Handler In A `then` Block Returns A Value Vs Returning A Resolved Promise, Does The `then` Block Handle It The Same Way?

How Make Promise Execute Synchronously?

I use dom-to-image.js for converting dom to png image. As dom-to-image.js uses promise, the code ex… Read more How Make Promise Execute Synchronously?

Firebase Web: Upload Multiple Files To Storage An Then Download Their Urls

I am creating a blogging website, and am writing code that does the following in order: 1. stores m… Read more Firebase Web: Upload Multiple Files To Storage An Then Download Their Urls

I'm Getting A 'wrapped Promise Not Iterable Error' Even Though I Have Only One Parameter

I'm trying to use a Promise.all in my node.js microservice. The intent of the Promise.all is to… Read more I'm Getting A 'wrapped Promise Not Iterable Error' Even Though I Have Only One Parameter

How To Use Multiple Xmlhttprequest.responsetext Values?

In javascript, how can I best combine multiple values which are obtained as arguments to callback f… Read more How To Use Multiple Xmlhttprequest.responsetext Values?

Node Async/await With Promise.all

In a simple JS program, I need to have asyncOperation2 and asyncOperation3 execute sequentially alo… Read more Node Async/await With Promise.all

Best Es6 Way To Get Name Based Results With Promise.all

By default the Promise.All([]) function returns a number based index array that contains the result… Read more Best Es6 Way To Get Name Based Results With Promise.all

Es6 Promise Settled Callback?

I want to run the same action whether my Promise resolved successfully or not. I don't want to … Read more Es6 Promise Settled Callback?

Returning Promise With An Async Function

Given the following two implementations (in ES6 / NodeJS) async TestFunc() { return new Promise… Read more Returning Promise With An Async Function

Expected One Assertion To Be Called But Received Zero Assertion Calls

I am trying to test a method using Jest... The method should return Promise.reject() . Here is the … Read more Expected One Assertion To Be Called But Received Zero Assertion Calls

How To Correctly Trap And Read Any Errors Generated In A Promise.all Call?

I currently have a node.js/graphql micro service that uses Promise.all to call another micro servic… Read more How To Correctly Trap And Read Any Errors Generated In A Promise.all Call?

Determine Which Promise Is Slowest In Promises.all

I have been using Promise.all in my app. For the purpose of improving app speed, how to determine … Read more Determine Which Promise Is Slowest In Promises.all

How To Use Promise.all() When I'd Like To Pass An Array Variable As An Argument

I'm in a problem using Promise.all(). I'd like to pass an array variable as an argument to … Read more How To Use Promise.all() When I'd Like To Pass An Array Variable As An Argument

NodeJS - Using Promises For API Calls

I have a nodeJS library, where I'm coding a certain functionality, which will call a SOAP API t… Read more NodeJS - Using Promises For API Calls