Develop Reference

Align JavaScript imports "from" Statement to be Vertically Aligned

I would like the end result of my imports to be like this, via a tool that can automatically format my code onSave:
import { Stack, StackProps, Duration, Resource } from "aws-cdk-lib";
import { LambdaStack } from "./lambda-Stack";
import { Construct } from "constructs";
How can I align all of the "from" statements vertically in VS Code? I've looked at both prettier and eslint.

Prettier doesn't care what you want. :-) It's an opinionated tool useful for applying consistency to code within teams (and for avoiding arguments about different formatting styles [although you just get arguments about whether to use Prettier instead]).
If you don't want Prettier's formatting, don't use Prettier. There are other code formatters, some of which offer more control than Prettier does.
You could tell Prettier to ignore each of those import statements:
// prettier-ignore
import { Stack, StackProps, Duration, Resource } from "aws-cdk-lib";
// prettier-ignore
import { LambdaStack } from "./lambda-Stack";
// prettier-ignore
import { Construct } from "constructs";
or
/* prettier-ignore*/ import { Stack, StackProps, Duration, Resource } from "aws-cdk-lib";
/* prettier-ignore*/ import { LambdaStack } from "./lambda-Stack";
/* prettier-ignore*/ import { Construct } from "constructs";
For now there's no "block ignore" in Prettier for JavaScript (only for certain select other languages), although there's an open request for one.

Usually, with prettier or eslint you might want to limit printWidth to defined number of caracter per line. So imagine if you have many imports or long module name :
/* You better should break line overhere |----------| */
import { DepA, DepB, DepC, DepD, DepE, DepF, DepG, DepH, DepI, DepJ } from "./some-long-named-module";
import { OnlyOneImport } from "./other-module";
So my answer is not responding to "how can you align 'from' statements?" but it
may open another question 'should you ?'
Here is a common way to indent imports :
// common way to write import with vertical (Automatable)
import {
DepA,
DepB,
DepC,
DepD,
DepE,
DepF,
DepG,
DepH,
DepI,
DepJ
} from "./some-long-named-module";
import { OnlyOneImport } from "./other-module";
Here is the eslint rule to auto indent your code : https://eslint.org/docs/latest/rules/object-curly-newline
example for object-curly-newline rule in eslint:
# .estlintrc.json
{
...
"rules": {
...
"object-curly-newline": [
"error",
{
"consistent": true,
"multiline": true
}
]
}
}
PS:
Here some example of how I use it
# .estlintrc.json
{
"root": true,
"extends": [
"airbnb-base", // See https://www.npmjs.com/package/eslint-config-airbnb
"airbnb-base/whitespace",
"plugin:jest/recommended", // See https://www.npmjs.com/package/eslint-plugin-jest
"prettier" // See https://github.com/prettier/eslint-config-prettier
],
"env": {
"jest/globals": true
},
"plugins": [
"jest",
"...whatever-you-want"
],
"ignorePatterns": [
"dist/",
"node_modules/",
"...whatever-you-want"
],
"rules": {
"no-restricted-syntax": [
"error",
"WithStatement",
"BinaryExpression[operator='in']"
],
"no-console": [
0,
{
"allow": [
"info",
"warn",
"error"
]
}
],
"quotes": [
"error",
"single",
"avoid-escape"
],
"object-curly-newline": [
"error",
{
"consistent": true,
"multiline": true
}
],
"...whatever-you-want"
}
}
# .prettierrc
{
"printWidth": 80,
"trailingComma": "es5",
"useTabs": false,
"tabWidth": 2,
"semi": true,
"singleQuote": true,
"quoteProps": "as-needed",
"jsxSingleQuote": false,
"bracketSpacing": true,
"bracketSameLine": false,
"proseWrap": "preserve",
"arrowParens": "avoid",
"endOfLine": "lf",
"parser": "babel"
}

Not getting IntelliSense in Visual Studio Code for React Native

I am trying to code a React Native application in Visual Studio Code. But I found that the hint for React Native for Styles element didn’t show when I code. I already installed:
ES7+ React/Redux/React-Native snippets
React Native Tools
Simple React Snippets
Here is the example when I type flex. It is supposed to show a list of styles element related to flex but it didn’t. Is anyone know how to enable it? Here is a screenshot:
Here is my settings.json file
{
"java.home": "C:\\Program Files\\Java\\jdk1.8.0_211",
"java.help.firstView": "gettingStarted",
"editor.suggestSelection": "first",
"vsintellicode.modify.editor.suggestSelection": "automaticallyOverrodeDefaultValue",
"python.languageServer": "Default",
"workbench.editorAssociations": {
"*.ipynb": "jupyter-notebook"
},
"notebook.cellToolbarLocation": {
"default": "right",
"jupyter-notebook": "left"
},
"php.suggest.basic": false,
"php.validate.enable": false,
"emmet.excludeLanguages": [
"markdown",
"php"
],
"php.validate.executablePath": "C:/xampp/php/php.exe",
"php.debug.executablePath": "C:/xampp/php/php.exe",
"php.executablePath": "C:/xampp/php/php.exe",
"vs-color-picker.autoLaunch": true,
"liveServer.settings.CustomBrowser": "chrome",
"liveServer.settings.useLocalIp": true,
"liveServer.settings.port": 0,
"workbench.colorTheme": "Visual Studio Dark",
"git.confirmSync": false,
"[javascript]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"
},
"workbench.iconTheme": "material-icon-theme",
"editor.formatOnPaste": true,
"editor.formatOnType": true,
"editor.formatOnSave": true,
"[vue]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"
},
"[javascriptreact]": {
"editor.defaultFormatter": "esbenp.prettier-vscode",
},
"emmet.includeLanguages": {
"javascript": "javascriptreact",
"typescript": "typescriptreact",
},
}

I solved this problem by following this post:
VsCode Intellisense react native not working
Which is installing this npm package into your project. By entering this command inside the terminal window of your VS Code:
npm install --save #types/react-native
Thanks for the help!

eslint no-use-before-define rules does not work in node.js

I use node.js 12.3.0 and i had installed eslint 7.0.0 by npm.
So i wrote the .eslintrc.js like below.
module.exports = {
"env": {
"commonjs": true,
"es6": true,
"node": true
},
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly"
},
"parserOptions": {
"ecmaVersion": 12
},
"rules": {
"semi": ["error", "always", {"omitLastInOneLineBlock": true }],
"no-shadow-restricted-names" : "error",
"no-unused-vars": ["warn", { "vars": "all" }],
"no-redeclare": ["error", { "builtinGlobals": true }],
"no-use-before-define": ["error", { "functions": true, "classes": true, "variables": true }]
}
};
As you know, i already added "no-use-before-define" but it didn't work.
All another eslint rules are worked fine but only "no-use-before-define" didn't check anythings.
Here is my examples js file.
let c = qwertqwert(); //As you know qwerqwert is not defined. I want to check this.
a = 123123; //I don't want to allow assign any value to variable before declaration.
b = asdfafasfdasdfas; //Also i need to check any undefined variable or functions are used.
Does "no-use-before-define" can check this?
It seems only can check when i use the variable or function before define or declaration.
Func(); //I use(call) first.
//But the define statement is after.
function Func()
{
return 10;
}
Above code had checked fine by eslint but it is meaningless.
Because i want let eslint to check usage of undefined functions or value.

if you define eslint should show the error you should write a rule like
if you don't want rule you can remove it or skip rule by file
"no-use-before-define": [
"error",
{
"functions": false,
"classes": false,
"variables": false
}
],
NOTE :- i am using extension of airbnb
extends: [
'airbnb-base',
],
it works for me
node js :- 14.17.6
eslint :- 7.12.1+
and if function is not defined then it shows

how to make .eslintrc accept single quotes

I am facing this error when I 'npm start' my project:
I already know the problem is in the .eslintrc file so I added this:
"rules": {
"quotes": [2, "single"],
}
and it's not working and it's the only solution I know
Update:
I tried deleting eslintConfig from package.json and it didn't work
and also "quotes": ["error", "single"] didn't work

You can try to turn the rule off by passing 0 in the .eslintrc config file:
{
"rules": {
"quotes": [0, "single"]
}
}

Based on the heading the solution is just to add a rule to allow single quotes. Refer below config, checkout rules object:
module.exports = {
env: {
browser: true,
es2020: true,
},
extends: ["eslint:recommended", "plugin:#typescript-eslint/recommended"],
parser: "#typescript-eslint/parser",
parserOptions: {
ecmaVersion: 11,
sourceType: "module",
},
plugins: ["#typescript-eslint", "prettier"],
rules: {
"prettier/prettier": [
1,
{
trailingComma: "es5",
//to enable single quotes
singleQuote: true,
semi: true,
},
],
...require("eslint-config-prettier").rules,
...require("eslint-config-prettier/#typescript-eslint").rules,
},
};
Try this out. If it doesn't work then share a bit more about the problem. May be write a small code try to replicate the issue and then share it here.
I hope this will help you out.
Cheers :)

Run eslint with the —fix flag and the problem will go away

I think you want to disable "quote" and "prettier/prettier" rules.
Please you can pass 0 to disable a rule.
{
"rules": {
"quotes": 0,
"prettier/prettier": 0
}
}

JSDOC: Tutorial config conf.json having parsing error

I followed all the steps mentioned and still I get "Unexpected token ? in JSON at position 0" error when I have a conf.json file in my tutorials folder. If I remove the conf.json, it works perfect. But I need the conf.json.
I have a tutorials folder with .md files and a conf.json file which looks like this
{
"name_of_tutorial": {
"title": "Test Title"
}
}
and in my jsdoc.json file looks like this
{
"tags": {
"allowUnknownTags": true,
"dictionaries": ["jsdoc", "closure"]
},
"opts": {
"recurse": true,
"encoding": "utf8",
"destination": "./docs",
"readme": "./Content/tutorials/project_README.md",
"tutorials": "./Content/tutorials"
},
"source": {
"includePattern": ".+\\.js(doc|x)?$",
"excludePattern": "(^|\\/|\\\\)_"
},
"plugins": [
"plugins/markdown"
],
"templates": {
"cleverLinks": false,
"monospaceLinks": false,
"default": { }
}
}
Looks like there is a problem when reading the file and parsing it as json.
Can you help me fix it?