I cloned an existant Vuejs project and made a "npm install".
Everything installed well except "moment" and maybe "vue-moment".
i've got this error :
Failed to compile.
./src/main.js
Module not found: Error: Can't resolve 'moment' in '/app/src'
so in installed them with "npm install --save moment vue-moment"
And still got the error.
here some code of my main.js file :
import moment from 'moment'
import VueMoment from 'vue-moment'
// Vue use moment.js
Vue.use(VueMoment, {
moment
});
moment.locale('fr');
the packages are installed and present in the node_modules folder and are present also in the package.log.json and package.json.
The weird things is, when other people clones this project, they don't have the problem. only me...
One (maybe) pist, is when i put my mouse hover the 'moment' (of the import), i see this :
.../node_modules/moment/moment like there is 2 moment folders, but it looks normal in the node_modules folder.
Thanks in advance!
EDIT SOLVED :
The problem was because i started the project with "docker-compose up" and not "npm run serve" on the FRONT. It started but i had this "moment" problem. Now it works well with the good console code to start the project ...
You cannot use the import function with moment.js since exports is not defined for that module. So you have to use require. You can do this :
Vue.use(require('vue-moment'));
If you really want to use moment.js using import you can do this as well.
import * as moment from 'moment';
Reference: https://www.npmjs.com/package/vue-moment
https://momentjs.com/docs/
Webpack / typescript require works but import doesn't
Related
I want to implement DESO into my app. The most convenient way is probably the DESO library from their developer hub.
I want to be as precise as possible here. So first I downloaded the deso-protocol npm package. In the readme of this library is stated that it is generated with nx. So I downloaded that too. No big issues. And I should: Run nx build deso-protocol to build the library.(in readme). Than I get an error that there is no workspace, when I want to create one with "npx create-nx-workspace deso-protocol --preset=core" , nx gets stuck in that process.
So I decided to do it without the building(I don't quite now if that is needed, am new to npm) and just do it with the classic js imports.
The "import Deso from 'deso-protocol';" from the docs isn't working. Because the module imports have to start with "/" or "./" or sth. similar etc.
So I tried import Deso from './node_modules/deso-protocol/src/index.js';. That's not working. Error:
Uncaught SyntaxError: import not found: default
using import { Deso } from './node_modules/deso-protocol/src/index.js'; doesn't work either because then Deso isn't found. I don't quite now what to do now.
Edit
I use plain JavaScript. deso-protocol uses plain JavaScript too, I hope. There isn't much code yet:
Index.js file:
import Deso from './node_modules/deso-protocol/src/index.js';
test.html file:
<script type="module" src="index.js"></script>
That's it. I use http.server from Python to host the local server.
Just install deso-protocol library from https://www.npmjs.com/package/deso-protocol with npm i deso-protocol
In your app import it as usual
import Deso from "deso-protocol";
And initialize
const deso = new Deso();
Readme file is really confusing, I have no idea what
Run nx build deso-protocol to build the library.
is supposed to mean, it works without that no problem.
tried running tests with vitest and it can seem to resolve dependencies from $lib/* and $app/* this is the error, Failed to resolve import "$lib/stores/store" from "src/lib/components/Hello.svelte". Does the file exist? here is the link to the playground https://gitlab.com/paulwvnjohi/hello-vitest
It seems Vitest is NOT automatically picking up your Vite config, since it's "hidden" in svelte.config.js and I'm sure there's tons of magic stuff SvelteKit adds, such as the resolve.alias paths for things like the $lib and $app imports to work.
I don't know if Vitest core would do something automatically in the future, but now there's the vitest-svelte-kit package you can use: https://github.com/nickbreaton/vitest-svelte-kit
Install the package:
npm i -D vitest-svelte-kit
Create a file vitest.config.js and put inside the method that magically extracts the correct vite config for you, according to your settings in svelte.config.js:
// vitest.config.js
import { extractFromSvelteConfig } from "vitest-svelte-kit"
export default extractFromSvelteConfig()
Worked for me!
I am running npm run dev with this simple app.js:
//import {JetApp, EmptyRouter, HashRouter } from "webix-jet";
import {JetApp} from "webix-jet/dist/es6/jet";
I am getting this error - not sure what i'm missing.
Module build failed: Module not found:
"./assets/app.js" contains a reference to the file "webix-jet/dist/es6/jet".
This file can not be found, please check it for typos or update it if the file got moved.
I've added webix and webix-jet via npm and I can see their sources/dist under node_modules
Thoughts?
First, normally you code must look like
import {JetApp} from "webix-jet";
so you need to import just from webix-jet module, there is no need to define exact file ( be sure that you have webix-jet as dependency in the package.json )
Also, this line ./assets/app.js" looks strange as well, as app.js is expected to be in the "src" folder, not in the "assets"
Dear Stack Overflow / Vue.js / Rollup community
This could be a noob question for the master plugin developers working with Vue and Rollup. I will write the question very explicitly hoping that it could help other noobs like me in the future.
I have simple plugin that helps with form validation. One of the components in this plugin imports Vue in order to programatically create a component and append to DOM on mount like below:
import Vue from 'vue'
import Notification from './Notification.vue' /* a very simple Vue component */
...
mounted() {
const NotificationClass = Vue.extend(Notification)
const notificationInstance = new NotificationClass({ propsData: { name: 'ABC' } })
notificationInstance.$mount('#something')
}
This works as expected, and this plugin is bundled using Rollup with a config like this:
import vue from 'rollup-plugin-vue'
import babel from 'rollup-plugin-babel'
import { terser } from 'rollup-plugin-terser'
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
export default {
input: 'src/index.js',
output: {
name: 'forms',
globals: {
vue: 'Vue'
}
},
plugins: [
vue(),
babel(),
resolve(),
commonjs(),
terser()
],
external: ['vue']
}
As you can see, Vue.js is getting externalised in this bundle. The aim (and the assumption) is that the client app that imports this plugin will be running on Vue, therefore there's no need to bundle it here (assumption).
The very simple src/index.js that the bundler uses is below:
import Form from './Form.vue'
export default {
install(Vue, _) {
Vue.component('bs-form', Form)
}
}
Rollup creates 2 files (one esm and one umd) and references them in in the plugins package.json file like below:
"name": "bs-forms",
"main": "./dist/umd.js",
"module": "./dist/esm.js",
"files": [
"dist/*"
],
"scripts": {
"build": "npm run build:umd & npm run build:es",
"build:es": "rollup --config rollup.config.js --format es --file dist/esm.js",
"build:umd": "rollup --config rollup.config.js --format umd --file dist/umd.js"
}
Everything works as expected up to this point and the bundles are generated nicely.
The client app (Nuxt SSR) imports this plugin (using npm-link since it's in development) with a very simple import in a plugin file:
/* main.js*/
import Vue from 'vue'
import bsForms from 'bs-forms'
Vue.use(bsForms)
This plugin file (main.js) is added to nuxt.config.js as a plugin:
// Nuxt Plugins
...
plugins: [{src: '~/plugins/main'}]
...
Everything still works as expected but here comes the problem:
Since the clients is a Nuxt app, the Vue is imported by default of course but the externalised Vue module (by the forms plugin) is also imported in the client. Therefore there is a duplication of this package in the client bundle.
I guess the client app can configure its webpack config in order to remove this duplicated module. Perhaps by using something like a Dedupe plugin or something? Can someone suggests how to best handle situation like these?
But what I really want to learn, is the best practice of bundling the plugin at the first place, so that the client doesn't have to change anything in its config and simply imports this plugin and move on.
I know that importing the Vue.js in the plugin may not be a great thing to do at the first place. But there could be other reasons for an import like this as well, for example imagine that the plugin could be written in Typescript and Vue.js / Typescript is written by using Vue.extend statements (see below) which also imports Vue (in order to enable type interface):
import Vue from 'vue'
const Component = Vue.extend({
// type inference enabled
})
So here's the long question. Please masters of Rollup, help me and the community out by suggesting best practice approaches (or your approaches) to handle situations like these.
Thank you!!!!
I had the same problem and I found this answer of #vatson very helpful
Your problem is the combination of "npm link", the nature of nodejs module loading and the vue intolerance to multiple instances from different places.
Short introduction how import in nodejs works. If your script has some kind of library import, then nodejs initially looks in the local node_modules folder, if local node_modules doesn't contain required dependency then nodejs goes to the folder above to find node_modules and your imported dependency there.
You do not need to publish your package on NPM. It is enough if you generate your package locally using npm pack and then install it in your other project npm install /absolute_path_to_your_local_package/your_package_name.tgz. If you update something in your package, you can reinstall it in your other project and everything should work.
Here is the source about the difference between npm pack and npm link https://stackoverflow.com/a/50689049/6072503.
I have sorted this problem with an interesting caveat:
The duplicate Vue package doesn't get imported when the plugin is used via an NPM package (installed by npm install -save <plugin-name> )
However, during development, if you use the package vie npm link (like npm link <plugin-name>) then Vue gets imported twice, like shown in that image in the original question.
People who encounter similar problems in the future, please try to publish and import your package and see if it makes any difference.
Thank you!
I'm using an Electron boilerplate, from here: https://github.com/szwacz/electron-boilerplate/
It's using gulp-rollup to bundle the assets, and a dev server can be run with npm start.
Here are my import statements from app.js:
import os from 'os';
import { remote } from 'electron';
import jetpack from 'fs-jetpack';
import env from './env';
import jquery from 'jquery';
import parsley from 'parsleyjs';
import select2 from 'select2/dist/js/select2.js';
import { setupForm } from './form/form';
Everything works fine on an initial load with npm start, but as soon as I edit a file and save, which triggers the watch to reload the build, I get an error:
Error: Could not load select2/dist/js/select2.js (imported by /##/repo-name-example/src/app.js): ENOENT: no such file or directory, open 'select2/dist/js/select2.js'
at /##/repo-name-example/node_modules/rollup/dist/rollup.js:9428:10
at process._tickDomainCallback (internal/process/next_tick.js:129:7)
If I cancel the process and just npm start again, everything is fine.
Why would it forget where select2 is?
Since you are importing this manually using a file path, rather than a named import like the jquery line, you need to use
import select2 from './select2/dist/js/select2.js';
Note the ./ at the beginning. Otherwise, it effectively looks for a module called select2/dist/js/select2.js, rather than using the path.
You also might need to do change it to
import select2 from './node_modules/select2/dist/js/select2.js';
(Assuming thats where the folder is)