es2020 | BrazilJS JavaScript 2020 playlist | Script Programming library
kandi X-RAY | es2020 Summary
kandi X-RAY | es2020 Summary
BrazilJS JavaScript 2020 playlist (portuguese only for now): Slides for my talk "ES2020 - O JavaScript finalmente enterprise?" Full spec:
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QUESTION
My project is a Node.js Express server written in Typescript using ESM.
Currently, my deployment process is as follows:
- Run deploy script on my local machine using pm2
- Pull in latest changes from git repo onto Ubuntu server
- Server runs
npm install
and builds Typescript Node.js project - Runs starter script in build/dist directory
I have to build the app on my server because I do not push my /dist
folder to my git repo, and the process is dependent on deleting and cloning the newest version of my repo.
But since I am deploying with the production
flag, it only installs my dependencies (not my devDependencies). I've had to move dependencies over from devDependencies just so my app can build on the server without any complaints.
For example, I currently want to setup babel with my project because I'm having trouble unit testing ES Modules (a story for another time). But because of my current setup, I need to install all my babel dependencies as regular dependencies and not devDependencies. This upsets me. I can't seem to find the right solution for my use case.
Am I just supposed to push my build folder to my git repo so that I can just run the starter file without having to build? I don't really like the idea of pushing my build folder.
Do I just continue putting some devDependencies as regular dependencies so that I can build properly on my server? I would really like a layer of separation between my dev/regular dependencies. Right now it's getting garbled.
Here are some relevant config files:
package.json
ANSWER
Answered 2022-Apr-07 at 14:57It happens because you are running npm install
with NODE_ENV=production
. Try to install your dependencies using npm install --production=false
, it should force to install dev dependencies even in production environment
QUESTION
I am using typescript version 4.3.5 and node version 14.18.1. I am compiling my code targeting old as well as new browsers (target=es5
in tsconfig). I am using Promise.all as well as Promise.allSettled both in my source code.
On older browsers, specifically Safari on IPhone 8, IOS version 11, I am getting client side errors with Promise.allSettled.
As per my understanding, when using target=es5
, typescript should compile to make the code compatible with older devices hence Promise.allSettled should work. Please help me understand the issue! Following is my tsconfig.json
ANSWER
Answered 2022-Mar-22 at 17:12As in the question Why do I need a polyfill with Typescript?, TypeScript doesn't automatically provide backwards-compatibility implementations ("polyfills"). Consequently, the target
tsconfig does less than you think it would: It only rewrites syntax like arrow functions and generators, not libraries like Promise. In fact, the only reason you can resolve Promise.allSettled in the first place is that you've specifically listed "ES2020.Promise"
in your lib
list, which tells TypeScript that in your environment you can assume you have access to ES2020 Promises (specifically Promise.allSettled
).
From those lib
docs, emphasis mine:
You may want to change these [
lib
entries] for a few reasons:
- Your program doesn’t run in a browser, so you don’t want the "dom" type definitions
- Your runtime platform provides certain JavaScript API objects (maybe through polyfills), but doesn’t yet support the full syntax of a given ECMAScript version
- You have polyfills or native implementations for some, but not all, of a higher level ECMAScript version
As in the question Promise.allSettled in babel ES6 implementation, you have several options to provide a polyfill yourself, but a notable one is es.promise.all-settled.js in core-js. You can integrate those into your Webpack build using the polyfills
entry point pointing to a short polyfill-import-only JS file, though the suggestion to use babel-polyfill
has been deprecated in favor of core-js/stable
.
You would need to import
or require
one of these:
core-js/stable/promise/all-settled
promise.allsettled
ts-polyfill/lib/es2020-promise
(usescore-js
anyway)
QUESTION
I dont know if this is a bug or something, but I simply cant remove the TS error in my IDE (Webstorm).
The error appears when I am using Array.prototype.at()
on any kind of array.
tsconfig.json:
...ANSWER
Answered 2022-Mar-10 at 17:02Array.at
requires ES2022
target which is available from TS 4.6 onwards.
QUESTION
TypeScript newbie here, having problems with Object.fromEntries
. I'm trying to pares form and cast its values to something else. For example, given homogeneous shape of all data being strings, below works:
ANSWER
Answered 2022-Mar-07 at 18:42In your TS config add "dom.iterable" to lib
:
QUESTION
Application successfully builds and ng serve runs. Application will not successfully run/initialize.
There have been no appreciable typescript code changes from when this was working to when failure occurred, so I am focusing on the html template and the tsconfig with context.
The when the html template logic of the generated main.js is run, the execution is failing somewhere/somehow on the second child element elementStart function execution.
...ANSWER
Answered 2022-Mar-04 at 18:11Even though the versions specified in the package.json file for all of the angular libraries should have resulted in the same version acorsss the board, there was a version mismatch between the angular/compiler and angular/core(and other critical angular libraries).
QUESTION
After trying to migrate form Angular 9 to 13, ng build --configuration production is not creating the polyfills-es5.js file which I need for IE 11. Is there any way to support IE 11 in Angular 13..?
I tried below things
Updated tsconfig.json file to target to es5
...ANSWER
Answered 2022-Mar-02 at 07:56This is all about transpiling to the correct module def and pulling in the correct polyfills (shims) for ie11. It's a pain now :(
QUESTION
I'm trying to connect my app with a firebase db, but I receive 4 error messages on app.module.ts:
...ANSWER
Answered 2021-Sep-10 at 12:47You need to add "compat" like this
QUESTION
Im upgrading a private angular library/package (my-lib) so i can migrate all other projects, but when imported into a project one of the services uses moment and throws an error: "ERROR TypeError: moment is not a function"
The library works in dev mode and the build and publish are ok and even when imported into a project all components and resources load fine and no errors are displayed, dependencies are download but seeams that some of the 3rd party dependencies are not known by "my-lib" after imported.
Even in the project i can import moment and use it but "my-lib" in node_modules dont see that package.
some of the files in "my-lib"
service.ts
...ANSWER
Answered 2022-Feb-08 at 18:11I had this issue trying to run moment in stackblitz. Setting "esModuleInterop":true
in compilerOptions
and using the import moment from 'moment'
syntax fixed it for me. Let me know if that works.
Enabling esmoduleInterop
also enables allowSyntheticDefaultImports
.
More info: https://www.typescriptlang.org/tsconfig#esModuleInterop
QUESTION
I've used Angular Material Icons on multiple projects and they work just fine. For some reason they don't currently work on my new project.
Here's my package.json file within node_modules/@angular/material/icons...
...ANSWER
Answered 2022-Feb-08 at 02:53Check if you have
QUESTION
I'm fairly new (today its the first day) with Amazon CDK. I have been currently following the initial tutorial in Amazon's CDK page.
I have installed aws
and cdk
:
ANSWER
Answered 2022-Jan-05 at 19:25This is extremely stupid mistake. I currently have 2 users in my machine setup and I was using the wrong one to deploy.
After performing aws configure
with the credentials of the correct account I was able to deploy
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