proposal-optional-chaining | property value that 's deep in a tree-like structure | Runtime Evironment library
kandi X-RAY | proposal-optional-chaining Summary
kandi X-RAY | proposal-optional-chaining Summary
When looking for a property value that's deep in a tree-like structure, one often has to check whether intermediate nodes exist:.
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QUESTION
EDIT1:I made a minimum reproduction repository here
code & reproduction steps are available at the repository.
EDIT2: Same error occurs when I embeded the transpiled code on html file.
EDIT3: I tracked down the main cause of this problem.
When I use gas-webpack-plugin, output file pukes this error. Simply removing the plugin solves the problem, but then I cannot access my main function on GAS.
I created a github issue on the official gas-webpack-plugin . Hope there's a workaround for this.
---Original question from here---
I'm using Clasp + Typescript + Webpack + Babel to locally develop GAS with npm libraries.
Until I used decorator in my project, it was working fine. However, using decorator(more precisely, class-validator) results in following error on GAS...
ANSWER
Answered 2022-Mar-11 at 03:37I talked to the author of the gas-webpack-plugin. https://github.com/fossamagna/gas-webpack-plugin/issues/685
When using decorators, gas-webpack-plugin exposes not only main() but also classValidatorMetadataStorage() to the top level.
By simply removing this from the transpiled file, I was able to run the code with decorators.
But we now don't have to do this manually now. The author already took care of the situation. As of gas-webpack-plugin@2.2.0, it has include option to avoid unnecessary function exposure.
Usase:
QUESTION
After upgrading react-scripts to v5, craco start does not work properly. App starts with no error but in browser, there is a blank page and if i open inspector, i only see index.html codes not react codes. It was working well with react-scripts@4.0.3. Here is my local files;
package.json
...ANSWER
Answered 2022-Feb-23 at 10:05craco's Github readme, states that it is supporting Create React App (CRA) 4.*. By this statement, I'm assuming CRA 5 is not officially supported by craco.
However, this repository utilizes both CRA 5 and craco (but I have not verified that it is working). Use this repository to compare your setup (after verifying that the linked repositry is working), and try different settings/configs to see if you get further.
QUESTION
I'am moving my react apps into docker, I am working in legacy project and we have multiple react apps. We are attaching script with react apps in script tags on every page whose need to use this files. For docker we want to use Express to serve our files. Is there any way to run multiple watch commands ?
here is my package.json file:
...ANSWER
Answered 2022-Feb-08 at 07:53I solved my problem, it turned out that I accidentally remove my nodemon package from package.json, and I had bad docker compose config. I changed it to this version:
QUESTION
I am working on a react project which was built using create-react-app and later we ejected and modified the webpack config a lot. Right now I am having a hard time importing const enums from external libraries. I don't have control over that external package. It has the const enums defined in it's d.ts files.
I have tried with babel-plugin-use-const-enum babel plugin and preset. It doesn't help me either.
My webpack config:
...ANSWER
Answered 2021-Oct-22 at 05:41QUESTION
I am migrating a NodeJS project to Typescript. I have already created the configurations and it runs with only JS. I am using @babel/node to run it in a dev environment, but when I try to import a TS file into JS it doesn't work.
It throws the following error:
...ANSWER
Answered 2021-Sep-01 at 13:41Solved: I had to add "@babel/plugin-transform-runtime" to .babelrc plugins property and change the entry point to my app. This is how it looks like now:
QUESTION
It seems that Typescript decided that the non-null assertion operator is !
while the ES2020 standard opted for ?
They both fix the bug and from what I understand, they do the same. My question is: Is there any reason to prefer one over the other?
...ANSWER
Answered 2021-Aug-05 at 02:00They are not the same.
The ! asserts to the type-checker (to TypeScript) that the value is defined.
The ?. (in the compiled JavaScript) permits further chained access to occur without throwing a JavaScript runtime error.
If you've figured out your types wrong, using ! incorrectly will result in a runtime error if the value happens not to be defined. Optional chaining, on the other hand, will not throw a runtime error if the value happens to be undefined or null.
QUESTION
Project setup:
- Vuejs 3
- Webpack 4
- Babel
- TS
We created the project using vue-cli and add the dependency to the library.
We then imported a project (Vue Currency Input v2.0.0) that uses optional chaining. But we get the following error while executing the serve script:
ANSWER
Answered 2021-Jun-17 at 12:37I had a similar problem. I'm using nuxt but my .babelrc file looks like the below, and got it working for me.
QUESTION
I am getting this error when I am trying to run my React Native app in iOS:
...ANSWER
Answered 2021-Feb-02 at 20:08run command from the project root folder.
if npm
rm -rf node_modules package-lock.json
if yarn
rm -rf node_modules yarn.lock
remove ^ from every package
set package version from the concerned library if that version exists then ok, otherwise set version that actually exists
run command
npm installoryarn install
then
cd ios
run command from ios folder
rm -rf Pods Podfile.lock
then
pod install
QUESTION
I have a Vue 2.6 project and I want to use the es2020 characteristics like optional chaining in my project but I can't get it to work in my project. I'm getting the following error.
...ANSWER
Answered 2021-Apr-27 at 11:31I don't think so you can achieve that, unless you will implement it by yourself. ES2020 features such an optional chaining are available in Vue 3, but not Vue 2.x.
QUESTION
I Know that there is a lot of topic about this, but since none of them work, I must make a new one, I'm quite confused as why my electron app doesn't launch when I used yarn dev for my project, but when my friends try it, in his laptop, he can run and the apps launch normally without any problem, so Is there anyone here ever face the same problem with me? if there is someone, how can you solve this problem?
this is what my terminal looks like:
for information I used:
...ANSWER
Answered 2021-Apr-28 at 12:55This may be a silly answer. Try checking whether the task is running or any other programs interfereing the app, like an antivirus.
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