I am setting a web app up in TypeScript and I seem to be missing some basic types I need.
When I compile (npm run build), I get the following errors,
error TS2304: Cannot find name 'HTMLElement'.
error TS2304: Cannot find name 'SVGElement'.
error TS2304: Cannot find name 'EventTarget'.
error TS2304: Cannot find name 'TouchEvent'.
error TS2304: Cannot find name 'MouseEvent'.
error TS2304: Cannot find name 'PointerEvent'.
Based on my Googling I assuming I am missing something basic in my project setup. It seems like these types are just assumed to be there with Typescript.
EDIT: Specially it should be part of the ES6 types, https://github.com/Microsoft/TypeScript/blob/master/lib/lib.es6.d.ts.
Here is my package.json file:
{
"name": "wip",
"version": "1.0.0",
"description": "",
"main": "index.html",
"dependencies": {
"hammerjs": "2.0.8"
},
"devDependencies": {
"#types/chai": "3.4.35",
"#types/mocha": "2.2.39",
"#types/node": "7.0.5",
"#types/hammerjs": "2.0.34",
"chai": "3.5.0",
"mocha": "3.2.0",
"safe-mock": "0.2.0",
"ts-node": "2.1.0",
"tslint": "4.5.1",
"typescript": "2.2.1",
"webpack": "^2.2.1",
"webpack-dev-server": "^2.4.1"
},
"scripts": {
"test": "mocha test --require ts-node/register test/**/*.ts && npm run build",
"dev": "webpack-dev-server --watch --content-base . -d --progress",
"build": "tsc"
},
"author": "",
"license": "ISC"
}
Any suggestions?
Try adding the following lib section to your tsconfig.json file.
{
"compilerOptions": {
"lib": [
"es2016",
"dom"
]
}
}
Additional answer for testing.
If using mocha, you also need to tell mocha about the DOM environment using jsdom.
https://journal.artfuldev.com/unit-testing-node-applications-with-typescript-using-mocha-and-chai-384ef05f32b2
$ npm install jsdom jsdom-global --save-dev
So your "test" script would add -r jsdom-global/register:
{
"scripts": {
"test": "mocha test -r ts-node/register -r jsdom-global/register test/**/*.ts && npm run build"
}
}
Related
I'm trying to put my application into production. But, the teacher who was teaching put it for me, the lib 'sucrase' to use syntax of "import from" instead of "require". Only now Heroku is complaining that he doesn't understand the syntax "import". Is there anything I can do about line of code and configuration? Or do I have to change all "import from" to "require"? ... Lower the logs ...
logs in Heroku
2020-06-27T20:21:41.876688+00:00 app[web.1]: /app/src/server.js:1
2020-06-27T20:21:41.876689+00:00 app[web.1]: import app from './app';
2020-06-27T20:21:41.876690+00:00 app[web.1]: ^^^^^^
2020-06-27T20:21:41.876690+00:00 app[web.1]:
2020-06-27T20:21:41.876691+00:00 app[web.1]: SyntaxError: Cannot use import statement outside a module
2020-06-27T20:21:41.876691+00:00 app[web.1]: at wrapSafe (internal/modules/cjs/loader.js:1054:16)
2020-06-27T20:21:41.876692+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:1102:27)
My package.json
{
"name": "futs",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"scripts": {
"start": "nodemon src/server.js",
/ ^ ^ ^ Below at the code is a configuration about the 'nodemon' that the teacher gave me
"dev:debug": "nodemon --inspect src/server.js"
},
"dependencies": {
"aws-sdk": "^2.704.0",
"bcryptjs": "^2.4.3",
"body-parser": "^1.19.0",
"cors": "^2.8.5",
"date-fns": "^2.14.0",
"dotenv": "^8.2.0",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"multer": "^1.4.2",
"multer-s3": "^2.9.0",
"nodemailer": "^6.4.10",
"pg": "^8.2.1",
"sequelize": "^5.21.13",
"sequelize-cli": "^5.5.1",
"uuid": "^8.1.0",
"yup": "^0.29.1"
},
"devDependencies": {
"eslint": "^6.8.0",
"eslint-config-airbnb-base": "^14.1.0",
"eslint-config-prettier": "^6.11.0",
"eslint-plugin-import": "^2.20.2",
"eslint-plugin-prettier": "^3.1.3",
"nodemon": "^2.0.4",
"prettier": "^2.0.5",
"sucrase": "^3.15.0"
}
}
nodemon.json
{
"execMap":{
"js": "node -r sucrase/register"
}
}
I don't know how to run to deploy, if anyone can help me
As you see in the error log : Cannot use import statement outside a module.
import statements are permitted only in ES modules not CommonJS see more about that here :
However you can make Node treat your file as a ES module you need to :
add "type": "module" to package.json .
Add --experimental-modules flag upon running your app(not necessary with Node 13.2.0+ so check your node version with node --version)
as follow :
// package.json
{
"type": "module"
}
take a look here for more information .
OR :
Alternatively you can use the .mjs instead of .jsextension .
SOURCES :
SyntaxError: Cannot use import statement outside a module
https://nodejs.org/api/esm.html .
https://nodejs.org/api/esm.html#esm_enabling .
https://nodejs.org/api/esm.html#esm_code_import_code_statements
To build my app using sucrase I use:
sucrase ./src -d ./dist --transforms imports
This is my package.json file:
"scripts": {
"dev": "nodemon src/server.js",
"build": "sucrase ./src -d ./dist --transforms imports",
"start": "node dist/server.js"
},
I tried to deploy my project developed using React and Node.js to Heroku, but after issuing git push heroku master, I got an error:
2020-06-05T02:12:18.092681+00:00 app[web.1]: import express from "express";
2020-06-05T02:12:18.092682+00:00 app[web.1]: ^^^^^^^
2020-06-05T02:12:18.092682+00:00 app[web.1]:
2020-06-05T02:12:18.092683+00:00 app[web.1]: SyntaxError: Unexpected identifier
2020-06-05T02:12:18.092683+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:718:23)
I googled and it is said that Node.js doesn't support ES6 syntax, and I can solve it by using babel.
But I don't know how to configure it.
Below are my files:
.babelrc.json:
{
"presets": [
[
"#babel/preset-env",
{
"targets": {
"node": "current"
}
}
]
]
}
package.json:
{
"name": "react_e-commerce",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "nodemon --watch backend --exec babel-node backend/server.js",
"build": "rimraf dist && babel backend -d dist",
"heroku-postbuild": "npm run build && cd e-commerce && npm install && npm run build"
},
"author": "",
"license": "ISC",
"dependencies": {
"body-parser": "^1.19.0",
"dotenv": "^8.2.0",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"mongoose": "^5.9.16"
},
"devDependencies": {
"#babel/cli": "^7.10.1",
"#babel/core": "^7.10.1",
"#babel/node": "^7.10.1",
"#babel/preset-env": "^7.10.1",
"babel-cli": "^6.26.0",
"mkdirp": "^1.0.4",
"nodemon": "^2.0.4",
"rimraf": "^3.0.2"
},
"engines": {
"node": "12.4.0",
"npm": "6.9.0"
}
}
And my whole project is on https://github.com/powerseed/e-commerce-React
The e-commerce folder is for frontend.
Thanks in advance!
You can just use require if you want. Here are the details on why there are two ways to bring in files. The difference between "require(x)" and "import x"
per the Nodejs docs I was able to use the following to run node node-module.js and similar may work in your situation--I'm unfamiliar with the specific node version you're working with currently, but the "type":"module" option would likely allow it--I'm using Nodejs v15 at the moment.
package.json
{
"type": "module"
}
node-module.js
import * as os from 'os';
import defaultstuff, { stuff } from './node-import-stuff.js';
console.log(123 === stuff, defaultstuff, Object.keys(os));
node-import-stuff.js
export const stuff = 123;
export default stuff;
I'm having a problem making a unitary test with jest over an es6 class. I don't know if the configurations were made properly or if I need some extra package.
This is my file queue.js
export default class Queue {
constructor() {
...
}
//Adds a new elemnt to the queue
method1(element) {
...
}
.
.
.
}
This is my test file
import Queue from "../src/queue";
const myQueue = new Queue();
describe("Queue", () => {
...
...
...
});
This is my .babelrc file
{
"presets": ["es2015"]
}
This is my package.json file. The clean, build and production scripts run all ok, but when I try to run the test, then an error is thrown.
{
"name": "queue",
"version": "1.0.0",
"description": "An implementation of a queue data structure",
"main": "queue.js",
"scripts": {
"test": "jest",
"clean": "rm -dr dist",
"build": "npm run clean && mkdir dist && babel src -s -d dist",
"production": "npm run build && node bin/production"
},
"author": "Osiris Román",
"license": "ISC",
"jest": {
"transform": {
"^.+\\.js$": "babel-jest"
}
},
"devDependencies": {
"babel-cli": "^6.26.0",
"babel-jest": "^25.4.0",
"babel-preset-es2015": "^6.24.1",
"babel-register": "^6.26.0",
"jest": "^25.3.0"
}
}
This is the error:
Plugin/Preset files are not allowed to export objects, only functions. In /home/usuario/practicing/javascript/queue/node_modules/babel-preset-es2015/lib/index.js
Does someone know how can I solve this problem?
The error you are getting means that one of your presets isn't compatible with the babel version.
Looking at your package.json you are using babel version 6. But both jest and babel-jest use later versions of babel. This causes your es2015 preset not to work correctly.
If you are tied to your current version of babel you can downgrade your jest and babel-jest dependencies to a version that uses older versions of babel:
npm uninstall --save-dev babel-jest jest
npm install --save-dev babel-jest#23.6.0 jest#23.6.0
If not, I would recommend to upgrade your babel version (babel-cli, babel-register and babel-preset-es2015 packages) to newer versions.
If you follow this second path, note that babel-preset-es2015 is deprecated and the use of #babel/preset-env is recommended instead.
I finally found how to solve the problem. I'll share here the configuration If someone else is having the same problem.
This is my file queue.js
export default class Queue {
constructor() {
...
}
//Adds a new elemnt to the queue
method1(element) {
...
}
.
.
.
}
This is my test file
import Queue from "../src/queue";
const myQueue = new Queue();
describe("Queue", () => {
...
...
...
});
I decided to use babel.config.js file insted of .babelrc file. This is the content of this new file.
module.exports = {
presets: [["#babel/preset-env", { targets: { node: "current" } }]],
};
This is my package.json file. The clean, build, dev, production and test scripts run all ok without errors.
{
"name": "queue",
"version": "1.0.0",
"description": "An implementation of a queue data structure",
"main": "queue.js",
"scripts": {
"test": "jest",
"clean": "rm -dr dist",
"build": "npm run clean && babel src -s -d dist ",
"production": "npm run build && node bin/production",
"dev": "npm run build && node bin/dev"
},
"author": "Osiris Román",
"license": "ISC",
"devDependencies": {
"#babel/cli": "^7.8.4",
"#babel/core": "^7.9.0",
"#babel/preset-env": "^7.9.5",
"#babel/register": "^7.9.0",
"babel-jest": "^25.5.0",
"jest": "^25.3.0"
}
}
Thanks to #mgarcia comment I decided to avoid babel-preset-es2015 to use the recommended #babel/preset-env .
Very strange error that I cannot seem to solve.
React-native and node.js and VS Code
To get VS Code to get this far I used the line, yarn add babel-cli
Error I'm Getting:
Debugger listening on ws://127.0.0.1:39061/61f6ad51-d255-463a-a0ad-b686be9b8b0d
Object {dataReducer: Object, reducerSPY: Object, userApp: Object}
home.js:31
Error: Cannot find module 'StyleSheet'
module.js:555
at Function.Module._resolveFilename (module.js:555:15)
at Function.Module._load (module.js:482:25)
at Module.require (module.js:604:17)
at require (internal/module.js:11:18)
at Object.get StyleSheet [as StyleSheet] (c:\AndroidEverything\AndroidStudioProjects\Property2\AwesomeProject\node_modules\react-native\Libraries\react-native\react-native-implementation.js:98:29)
at Object.<anonymous> (c:/AndroidEverything/AndroidStudioProjects/Property2/AwesomeProject/app/components/home.js:195:16)
Strange because:
My app runs fine
If I comment out this line all other imports are found, just
StyleSheet.
All files are as I expected in its location. This seems buggy?
home.js(which is called by App.js)
import {
FlatList,
View,
Text,
ActivityIndicator,
StyleSheet
} from 'react-native';
launch.json
{
"type": "node",
"request": "launch",
"name": "Launch Program",
"program": "${workspaceFolder}/App.js",
"runtimeExecutable": "${workspaceFolder}/node_modules/.bin/babel-node",
},
package.json
{
"name": "AwesomeProject",
"version": "0.1.0",
"private": true,
"devDependencies": {
"jest-expo": "25.0.0",
"react-native-scripts": "1.11.1",
"react-test-renderer": "16.2.0"
},
"main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
"scripts": {
"start": "react-native-scripts start",
"eject": "react-native-scripts eject",
"android": "react-native-scripts android",
"ios": "react-native-scripts ios",
"test": "node node_modules/jest/bin/jest.js"
},
"jest": {
"preset": "jest-expo"
},
"dependencies": {
"babel-cli": "^6.26.0",
"expo": "^25.0.0",
"react": "16.0.0",
"react-dom": "16.0.0",
"react-native": "0.52.0",
"react-navigation": "^1.5.1",
"react-redux": "^5.0.7",
"redux": "^3.7.2",
"redux-thunk": "^2.2.0",
"save": "^2.3.2"
}
}
Any ideas where to keep digging? launch.json file? connectivity? yarn? or a spelling error?
UPDATE:
Removed the line about babel since i'm using yarn for node.js and Expo to run on android. error has changed to:
path\Property2\AwesomeProject\App.js:1
(function (exports, require, module, __filename, __dirname) { import React,
{ Component } from 'react';
^^^^^^
SyntaxError: Unexpected token import
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:152:10)
at Module._compile (module.js:624:28)
at Object.Module._extensions..js (module.js:671:10)
using yarn upgrade jest-expo#25.1.0-beta.0
warning "expo > react-native-maps#0.19.0" has incorrect peer dependency
"react-native#0.51.0".
warning " > react-native#0.52.0" has incorrect peer dependency
"react#16.2.0".
warning "jest-expo > babel-jest#22.4.3" has unmet peer dependency "babel-
core#^6.0.0 || ^7.0.0-0".
[4/4] Rebuilding all packages...
success Saved lockfile.
success Saved 1 new dependency.
└─ jest-expo#25.1.0-beta.0
warning "jest-expo" is already in "devDependencies". Please remove existing
entry first before adding it to "dependencies".
This is the minimal package.json file of my react native sample project just created to test your cases. Basically you are using CRNA (create-react-native-app) to create your project this is a expo client. See my package.json file below:
{
"name": "AwesomeProject",
"version": "0.1.0",
"private": true,
"devDependencies": {
"react-native-scripts": "1.13.1",
"jest-expo": "26.0.0",
"react-test-renderer": "16.3.0-alpha.1"
},
"main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
"scripts": {
"start": "react-native-scripts start",
"eject": "react-native-scripts eject",
"android": "react-native-scripts android",
"ios": "react-native-scripts ios",
"test": "jest"
},
"jest": {
"preset": "jest-expo"
},
"dependencies": {
"expo": "^26.0.0",
"react": "16.3.0-alpha.1",
"react-native": "0.54.0"
}
}
You don't need to add babel-cli for basic project read its usage here but if you still need then add it to your dev-dependencies. Also react-dom you still not need because its for reactjs projects not for react-native.
My suggestion is try to read before you start your project and go step by step then you'll not stuck in some irrelevant issue.
What node version are you using? I am asking this because in your question you mentioned the error the code is throwing
path\Property2\AwesomeProject\App.js:1
(function (exports, require, module, __filename, __dirname) { import React,
{ Component } from 'react';
^^^^^^
SyntaxError: Unexpected token import
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:152:10)
at Module._compile (module.js:624:28)
at Object.Module._extensions..js (module.js:671:10)
and it seems like code is having trouble resolving import statements.So it may be that yout babel is not able resolve this new syntax.
I am developing a WebGL library that I would like to import into an EmberJS project as a dependency. Unless I'm mistaken, I believe that I can do this via the repository directly without having to make an npm package but I am having trouble getting it to work.
I have made a watered down library and ember project in a couple repos here and here respectively to demonstrate my problem.
If you clone the library and run npm run build it'll make a test bundle which can be called by the test html file packageTest.html. It should print out 'Hello World Test Member is: 5'.
In the Ember project I have a component in which I would like to import the 'HelloWorld' class from the library and call one of its member methods.
import Ember from 'ember';
//import HelloWorld from 'npm-package-test';
export default Ember.Component.extend({
isWide: false,
actions: {
toggleImageSize() {
// var h = new HelloWorld();
// console.log(h.print());
this.toggleProperty('isWide');
}
}
});
When I uncomment the import statement I get the console error
Error: Could not find module 'npm-package-test'
I'm still pretty new to npm packaging and how dependencies work (and know next to nothing about Ember) but from my limited understanding I feel like this method should work the way I currently have it.
For the library, I have the source files being babeled into ES5 in its lib folder. As you can see in the package.json for the library below I have the main set to the index file in the lib folder so that the Ember project can pull the babeled modules.
Library: package.json
{
"name": "npm-package-test",
"version": "1.0.0",
"description": "JibJab Render Library for eCards",
"main": "lib/index.js",
"scripts": {
"prepublishOnly": "npm run build",
"build-test": "browserify test.js > demo/testbundle.js",
"build": "babel ./src -d ./lib && npm run build-test",
"lint": "eslint ./src",
"test": "nyc mocha --require babel-core/register"
},
"repository": {
"type": "git",
"url": "git+https://github.com/nhoughto5/NPM_PackageTest.git"
},
"author": "JibJab",
"license": "ISC",
"bugs": {
"url": "https://github.com/nhoughto5/NPM_PackageTest/issues"
},
"homepage": "https://github.com/nhoughto5/NPM_PackageTeste#readme",
"devDependencies": {
"babel-cli": "6.26.0",
"babel-preset-env": "1.6.1",
"eslint": "4.19.0",
"mocha": "5.0.4",
"nyc": "11.6.0"
},
"nyc": {
"reporter": [
"lcov",
"text"
]
},
"dependencies": {
"domready": "^1.0.8"
}
}
For reference, here is the lib/index.js which should be the entry point of my library:
Library: lib/index.js
'use strict';
module.exports = {
TestClass: require('./TestClass'),
HelloWorld: require('./HelloWorld')
};
In the ember project I have the library repository listed as a dependency:
Ember: package.json
{
"name": "test-ember-app",
"version": "0.0.0",
"description": "Small description for test-ember-app goes here",
"license": "MIT",
"author": "",
"directories": {
"doc": "doc",
"test": "tests"
},
"repository": "",
"scripts": {
"build": "ember build",
"start": "ember server",
"test": "ember test"
},
"devDependencies": {
"broccoli-asset-rev": "^2.4.5",
"ember-ajax": "^3.0.0",
"ember-browserify": "1.2.1",
"ember-cli": "2.13.1",
"ember-cli-app-version": "^3.0.0",
"ember-cli-babel": "^6.0.0",
"ember-cli-dependency-checker": "^1.3.0",
"ember-cli-eslint": "^3.0.0",
"ember-cli-htmlbars": "^1.1.1",
"ember-cli-htmlbars-inline-precompile": "^0.4.0",
"ember-cli-inject-live-reload": "^1.4.1",
"ember-cli-mirage": "0.4.3",
"ember-cli-qunit": "^4.0.0",
"ember-cli-shims": "^1.1.0",
"ember-cli-sri": "^2.1.0",
"ember-cli-tutorial-style": "2.0.0",
"ember-cli-uglify": "^1.2.0",
"ember-data": "^2.13.0",
"ember-export-application-global": "^2.0.0",
"ember-load-initializers": "^1.0.0",
"ember-resolver": "^4.0.0",
"ember-source": "~2.13.0",
"ember-welcome-page": "^3.0.0",
"loader.js": "^4.2.3"
},
"engines": {
"node": ">= 4"
},
"private": true,
"dependencies": {
"npm-package-test": "git+https://github.com/nhoughto5/NPM_PackageTest.git"
}
}
When I run npm install in the ember project I can see that the folder structure from the library appears in the node_modules folder. To my limited experience, everything seems correct but for some reason I am still getting this undefined module error.
Is there a step I've missed or some crucial detail I'm missing?
Yes, there’s one step you are still missing. For Ember-CLI to understand that you want to include your npm package in your app’s vendor files, you’ll need to use app.import as outlined here: https://guides.emberjs.com/v3.0.0/addons-and-dependencies/managing-dependencies/
That approach with app.import has existed since Ember-CLI 2.15, but if you are on an older version you’ll need to upgrade first.