Vue CLI build target lib -> externalize images (Vue 3) - javascript

I have a question regarding vue-cli's target build lib. I have an app that produces a custom element following this documentation. Check:
/* ce.js */
import { defineCustomElement } from 'vue';
import Chat from './App.ce.vue';
const element = defineCustomElement(Chat);
customElements.define('chat-widget', element);
The build command looks as follows:
/* package.json */
"build-wc": "vue-cli-service build --target lib --inline-vue --name chat-widget --dest ./wwwroot src/ce.js"
This is actually working all fine but not exactly how i want it. My images are all generated inline which totally bloats my generated umd file. Also when i put my app on a server it refuses to load the images when inline because of Content-Security-Policy issues (another discussion).
Is there a way to tell webpack / vue-cli that I want my images in separate folder? Preferably in the destination folder under /img.

Figured it out! Just set the maxSize of the image parser to very low and the images will be dropped in /img in the output folder. Cheers!
const { defineConfig } = require("#vue/cli-service");
module.exports = defineConfig({
...
chainWebpack: (config) => {
...
config.module.rule("images").set("parser", {
dataUrlCondition: {
maxSize: 4 * 1024, // 4KiB
},
});
...
},
});

Related

Next.js (React) - Can't import local typescript file into config file

Situation
I would like to run some Database code (mongoDB(mongoose)) on server startup / during builds. Considering next js doesn't have any lifecycle hooks that you can hook into in an easy manner, I was trying to perform the database actions in my webpack (next.config.mjs) configuration. However I ran into some problems with importing local files.
Current setup
This is the code of my current next.config.mjs file. (PS. I have also tried the CommonJS way of requiring the needed files, but that also fails with error meessage "module not found".)
None of the lines that import a local typescript file appear to succeed and I have checked the paths multiple times. They always end up with the error message "ERR_MODULE_NOT_FOUND". Only if a node_module package is imported, it works as expected (the mongoose npm package).
Code
/** #type {import('next').NextConfig} */
const { EmployeesSchema } = await import("./mongodb_schemas/employee_schema");
import { EmployeesSchema } from "./mongodb_schemas/employee_schema";
import "./util/test"
import mongoose from "mongoose";
const nextConfig = {
experimental: {
externalDir: true,
},
reactStrictMode: true,
swcMinify: true,
images: {
domains: ["*", "**", "www.google.com"],
},
webpack: (
config,
{ buildId, dev, isServer, defaultLoaders, nextRuntime, webpack }
) => {
if (isServer) {
console.log(process.cwd());
}
return config;
},
};
export default nextConfig;
Anyone got a clue to why this might end up happening / have any possible solutions to the problem? I have also tried with a normal JavaScript file instead of a Typescript file, which also didn't work. I have found some similar asked questions on Stack Overflow but which were all left unanswered.
My guess for the reason why this occurs: during the build of the project, so when "npm run dev" is ran, the next.config.mjs is copied to a different location into the file structure, which means that the relative paths aren't correct anymore and thus the files can't be found.
PS. My apologize if the question is unclear / in an unusual format, it is my first post so not used to it.

How to use node modules outside of webpack encore files?

I have started using webpack encore in my Symfony 5 web app and still haven't figured it all out.
I'd like to use node modules outside of webpack encore files but I can't find a way of doing this.
For example I have installed Datatables and I'd like to use it in a JavaScript file inside the public/assets/js directory, but when I try I get $(...).DataTable is not a function.
In my app.js I do import all the modules I need :
import 'select2';
import 'parsleyjs';
import 'datatables';
Here is my webpack.config.js :
const Encore = require('#symfony/webpack-encore');
// Manually configure the runtime environment if not already configured yet by the "encore" command.
// It's useful when you use tools that rely on webpack.config.js file.
if (!Encore.isRuntimeEnvironmentConfigured()) {
Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev');
}
Encore
// directory where compiled assets will be stored
.setOutputPath('public/build/')
// public path used by the web server to access the output path
.setPublicPath('/build')
// only needed for CDN's or sub-directory deploy
//.setManifestKeyPrefix('build/')
/*
* ENTRY CONFIG
*
* Each entry will result in one JavaScript file (e.g. app.js)
* and one CSS file (e.g. app.css) if your JavaScript imports CSS.
*/
.addEntry('app', './assets/app.js')
// enables the Symfony UX Stimulus bridge (used in assets/bootstrap.js)
.enableStimulusBridge('./assets/controllers.json')
// When enabled, Webpack "splits" your files into smaller pieces for greater optimization.
.splitEntryChunks()
// will require an extra script tag for runtime.js
// but, you probably want this, unless you're building a single-page app
// .enableSingleRuntimeChunk()
.disableSingleRuntimeChunk()
/*
* FEATURE CONFIG
*
* Enable & configure other features below. For a full
* list of features, see:
* https://symfony.com/doc/current/frontend.html#adding-more-features
*/
.cleanupOutputBeforeBuild()
.enableBuildNotifications()
.enableSourceMaps(!Encore.isProduction())
// enables hashed filenames (e.g. app.abc123.css)
.enableVersioning(Encore.isProduction())
.configureBabel((config) => {
config.plugins.push('#babel/plugin-proposal-class-properties');
})
// enables #babel/preset-env polyfills
.configureBabelPresetEnv((config) => {
config.useBuiltIns = 'usage';
config.corejs = 3;
})
// enables Sass/SCSS support
//.enableSassLoader()
// uncomment if you use TypeScript
//.enableTypeScriptLoader()
// uncomment if you use React
//.enableReactPreset()
// uncomment to get integrity="..." attributes on your script & link tags
// requires WebpackEncoreBundle 1.4 or higher
//.enableIntegrityHashes(Encore.isProduction())
// uncomment if you're having problems with a jQuery plugin
.autoProvidejQuery()
;
module.exports = Encore.getWebpackConfig();

Storybook webpack absolute import

In our app we are using absolute paths for import modules. We have react folder into our resolve root:
Folder structure
We are using webpack for build and develop app and it works ok, with the next options:
resolve: {
modules: [
'node_modules',
path.resolve('src')
]
},
I'm working on integration of storybook and found, that it can't find any module from this react folder.
ERROR in ./stories/index.stories.js
Module not found: Error: Can't resolve 'react/components/Button' in 'project_name/stories'
# ./stories/index.stories.js
for the next line:
import Button from 'react/components/Button';
As mark: I added resolve/modules to .storybook/webpack config and also if I try to import anything other from, for example services/xxx - it works.
Issues
react folder name conflicts with actual React package location: node_modules/react. Webpack tries to resolve to .resolution(default is node_modules) if the file does not exist in the path.
.resolution is not appropriate for this sort of usage. it is mostly used for package resolution because it can't tell source strings.
to change path selectively, use alias instead.
Solution
change your component folder's name so that it does not collide with node_modules/react. a good example is view/components/Button.
add alias to .storybook/main.js setting
// .storybook/main.js
const path = require('path');
module.exports = {
/* ... other settings goes here ... */
/**
* #param {import('webpack').Configuration} config
* */
webpackFinal: async (config, { configType }) => {
if (!config.resolve) config.resolve = {};
// this config allows to resolve `view/...` as `src/view/...`
config.resolve.alias = {
...(config.resolve.alias || {}),
view: path.resolve(__dirname, '../src/view'),
};
return config;
},
};
change storybook code in accordance with (1)
// Button.stories.jsx
import Button from 'view/components/Button';
//...

How can I get PurifyCSSPlugin to remove my unused css in Angular6?

I'm trying to remove a lot of unused css within my sass files in my Angular 6 project.
I'm learned that there is a webpack plugin called PurifyCss.
Currently now, I'm unable to eject the webpack config in my angular project so I'm using ngw to help add the necessary plugins (to angular's webpack config) needed to extract the unused css in my sass files.
ngw.config.ts
import * as webpack from 'webpack';
import { Path } from '#angular-devkit/core';
import { NormalizedBrowserBuilderSchema } from '#angular-devkit/build-angular';
import * as PurifyCSSPlugin from 'purifycss-webpack';
import * as path from 'path';
import * as glob from 'glob';
export type WebpackOptions<T = NormalizedBrowserBuilderSchema> = {
root: Path,
projectRoot: Path,
options: T;
};
const command = process.argv[2].toLowerCase();
export default function (config: webpack.Configuration, options: WebpackOptions) {
if (command === 'test') {
console.log('Test configuration is running');
}
console.log('To modify webpack build, you can use ngw.config.ts');
console.log('check path:', glob.sync(path.join(__dirname, 'src/**/*.html')));
config.plugins.push(
new PurifyCSSPlugin({
// This was suggested to help it actually remove the css from: https://github.com/webpack-contrib/purifycss-webpack/issues/54
// Although there is an error of: Error: data['resolveExtensions'] should NOT have additional properties
resolveExtensions: ['.html', '.js'],
// This causes the build to run but does not remove the unused css
paths: glob.sync(path.join(__dirname, 'src/**/*.html'))
}),
);
return config;
}
Using the paths property alone doesn't work and it was suggested to add resolveExtensions from here.
Although this leads to the error below when doing a ngw prod build:
Error: data['resolveExtensions'] should NOT have additional properties
How can I configure the PurifyCSSPlugin to remove unused css within sass files in an Angular-6-cli environement?
Note: I don't have much experience with webpack, so I'm not sure if this config only works with css files instead of scss files. (If so please correct me).
Thanks

The create-react-app imports restriction outside of src directory

I am using create-react-app. I am trying to call an image from my public folder from a file inside my src/components. I am receiving this error message.
./src/components/website_index.js Module not found: You attempted to
import ../../public/images/logo/WC-BlackonWhite.jpg which falls
outside of the project src/ directory. Relative imports outside of
src/ are not supported. You can either move it inside src/, or add a
symlink to it from project's node_modules/.
import logo from '../../public/images/logo_2016.png';
<img className="Header-logo" src={logo} alt="Logo" />
I have read many things saying you can do an import to the path but that is still not working for me. Any help would be greatly appreciated. I know there are many questions like this but they are all telling me to import logo or image so clearly I am missing something in the big picture.
This is special restriction added by developers of create-react-app. It is implemented in ModuleScopePlugin to ensure files reside in src/. That plugin ensures that relative imports from app's source directory don't reach outside of it.
There is no official way to disable this feature except using eject and modify webpack config.
But, most features and its updates are hidden into the internals of create-react-app system. If you make eject you will have no more new features and its update. So if you are not ready to manage and configure application included to configure webpack and so on - do not do eject operation.
Play by the existing rules - move assets to src or use based on public folder url without import.
However instead of eject there are much unofficial solutions, based on
rewire which allows you to programmatically modify the webpack config without eject. But removing the ModuleScopePlugin plugin is not good - this loses some protection and does not adds some features available in src. ModuleScopePlugin is designed to support multiple folders.
The better way is to add fully working additional directories similar to src also protected by ModuleScopePlugin. This can be done using react-app-alias
Anyway do not import from public folder - that will be duplicated in the build folder and will be available by two different url (and with different ways to load), which ultimately worsen the package download size.
Importing from the src folder is preferable and has advantages. Everything will be packed by webpack to the bundle with chunks optimal size and for best loading efficiency.
The package react-app-rewired can be used to remove the plugin. This way you do not have to eject.
Follow the steps on the npm package page (install the package and flip the calls in the package.json file) and use a config-overrides.js file similar to this one:
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
module.exports = function override(config, env) {
config.resolve.plugins = config.resolve.plugins.filter(plugin => !(plugin instanceof ModuleScopePlugin));
return config;
};
This will remove the ModuleScopePlugin from the used WebPack plugins, but leave the rest as it was and removes the necessity to eject.
Remove it using Craco:
module.exports = {
webpack: {
configure: webpackConfig => {
const scopePluginIndex = webpackConfig.resolve.plugins.findIndex(
({ constructor }) => constructor && constructor.name === 'ModuleScopePlugin'
);
webpackConfig.resolve.plugins.splice(scopePluginIndex, 1);
return webpackConfig;
}
}
};
If your images are in the public folder then you should use
"/images/logo_2016.png"
in your <img> src instead of importing
'../../public/images/logo_2016.png';
This will work
<img className="Header-logo" src="/images/logo_2016.png" alt="Logo" />
To offer a little bit more information to other's answers. You have two options regarding how to deliver the .png file to the user. The file structure should conform to the method you choose. The two options are:
Use the module system (import x from y) provided with react-create-app and bundle it with your JS. Place the image inside the src folder.
Serve it from the public folder and let Node serve the file. create-react-app also apparently comes with an environment variable e.g. <img src={process.env.PUBLIC_URL + '/img/logo.png'} />;. This means you can reference it in your React app but still have it served through Node, with your browser asking for it separately in a normal GET request.
Source: create-react-app
There are a few answers that provide solutions with react-app-rewired, but customize-cra includes a removeModuleScopePlugin() API which is a bit more elegant. (It's the same solution, but abstracted away by the customize-cra package.)
npm i --save-dev react-app-rewired customize-cra
package.json
"scripts": {
- "start": "react-scripts start"
+ "start": "react-app-rewired start",
...
},
config-overrides.js
const { removeModuleScopePlugin } = require('customize-cra')
module.exports = removeModuleScopePlugin()
I was able to import files outside of src/ by "copying" the outside files with file: as local dependency.
"dependencies": {
"#my-project/outside-dist": "file:./../../../../dist".
}
then
import {FooComponent} from "#my-project/outside-dist/components";
No eject or react-app-rewired or other 3rd-party solution was needed.
You need to move WC-BlackonWhite.jpg into your src directory. The public directory is for static files that's going to be linked directly in the HTML (such as the favicon), not stuff that you're going to import directly into your bundle.
install these two packages
npm i --save-dev react-app-rewired customize-cra
package.json
"scripts": {
- "start": "react-scripts start"
+ "start": "react-app-rewired start"
},
config-overrides.js
const { removeModuleScopePlugin } = require('customize-cra');
module.exports = function override(config, env) {
if (!config.plugins) {
config.plugins = [];
}
removeModuleScopePlugin()(config);
return config;
};
I think Lukas Bach solution to use react-app-rewired in order to modify webpack config is a good way to go, however, I wouldn't exclude the whole ModuleScopePlugin but instead whitelist the specific file that can be imported outside of src:
config-overrides.js
const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin");
const path = require("path");
module.exports = function override(config) {
config.resolve.plugins.forEach(plugin => {
if (plugin instanceof ModuleScopePlugin) {
plugin.allowedFiles.add(path.resolve("./config.json"));
}
});
return config;
};
Copy-Paste Typescript solution
(e.g. this will work for a CRA/TS stack, which requires an additional step compared to CRA/JS. The solution itself is not typed.)
Adds the required paths to the ModuleScopePlugin instead of bluntly removing the plugin.
This code below is using craco, but should be easily usable for react-app-rewired or similar solutions. You just need to find the spot where you have a webpackConfig object (react-app-rewired: module.exports.webpack inside your config-overrides.js), and pass it to the provided functions.
craco.config.js
const path = require("path");
const enableImportsFromExternalPaths = require("./src/helpers/craco/enableImportsFromExternalPaths");
// Paths to the code you want to use
const sharedLibOne = path.resolve(__dirname, "../shared-lib-1/src");
const sharedLibTwo = path.resolve(__dirname, "../shared-lib-2/src");
module.exports = {
plugins: [
{
plugin: {
overrideWebpackConfig: ({ webpackConfig }) => {
enableImportsFromExternalPaths(webpackConfig, [
// Add the paths here
sharedLibOne,
sharedLibTwo,
]);
return webpackConfig;
},
},
},
],
};
helpers/craco/enableImportsFromExternalPaths.js
const findWebpackPlugin = (webpackConfig, pluginName) =>
webpackConfig.resolve.plugins.find(
({ constructor }) => constructor && constructor.name === pluginName
);
const enableTypescriptImportsFromExternalPaths = (
webpackConfig,
newIncludePaths
) => {
const oneOfRule = webpackConfig.module.rules.find((rule) => rule.oneOf);
if (oneOfRule) {
const tsxRule = oneOfRule.oneOf.find(
(rule) => rule.test && rule.test.toString().includes("tsx")
);
if (tsxRule) {
tsxRule.include = Array.isArray(tsxRule.include)
? [...tsxRule.include, ...newIncludePaths]
: [tsxRule.include, ...newIncludePaths];
}
}
};
const addPathsToModuleScopePlugin = (webpackConfig, paths) => {
const moduleScopePlugin = findWebpackPlugin(
webpackConfig,
"ModuleScopePlugin"
);
if (!moduleScopePlugin) {
throw new Error(
`Expected to find plugin "ModuleScopePlugin", but didn't.`
);
}
moduleScopePlugin.appSrcs = [...moduleScopePlugin.appSrcs, ...paths];
};
const enableImportsFromExternalPaths = (webpackConfig, paths) => {
enableTypescriptImportsFromExternalPaths(webpackConfig, paths);
addPathsToModuleScopePlugin(webpackConfig, paths);
};
module.exports = enableImportsFromExternalPaths;
Taken from here and here 🙏
Image inside public folder
use image inside html extension
<img src="%PUBLIC_URL%/resumepic.png"/>
use image inside js extension
<img src={process.env.PUBLIC_URL+"/resumepic.png"}/>
use image inside js Extension
This restriction makes sure all files or modules (exports) are inside src/ directory, the implementation is in ./node_modules/react-dev-utils/ModuleScopePlugin.js, in following lines of code.
// Resolve the issuer from our appSrc and make sure it's one of our files
// Maybe an indexOf === 0 would be better?
const relative = path.relative(appSrc, request.context.issuer);
// If it's not in src/ or a subdirectory, not our request!
if (relative.startsWith('../') || relative.startsWith('..\\')) {
return callback();
}
You can remove this restriction by
either changing this piece of code (not recommended)
or do eject then remove ModuleScopePlugin.js from the directory.
or comment/remove const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin'); from ./node_modules/react-scripts/config/webpack.config.dev.js
PS: beware of the consequences of eject.
Adding to Bartek Maciejiczek's answer, this is how it looks with Craco:
const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin");
const path = require("path");
module.exports = {
webpack: {
configure: webpackConfig => {
webpackConfig.resolve.plugins.forEach(plugin => {
if (plugin instanceof ModuleScopePlugin) {
plugin.allowedFiles.add(path.resolve("./config.json"));
}
});
return webpackConfig;
}
}
};
My previous workaround worked with Webpack 4, but not with 5. After skimming through the accumulated workarounds since then, I found the following one really easy (and seemingly scalable).
import { CracoAliasPlugin } from 'react-app-alias';
const cracoConfig = {
plugins: [
{
plugin: CracoAliasPlugin,
options: {
alias: { '~': './' },
},
},
],
}
Then import like so:
import whatever from '~/<path-to-file>';
I have had to overcome this same issue in Truffle. The solution was as follows:
ince Create-React-App's default behavior disallows importing files from outside of the src folder, we need to bring the contracts in our build folder inside src. We can copy and paste them every time we compile our contracts, but a better way is to simply configure Truffle to put the files there.
In the truffle-config.js file, replace the contents with the following:
const path = require("path");
module.exports = {
contracts_build_directory: path.join(__dirname, "client/src/contracts")
};
I don't know if this helps you, but I know I found your question when I had the same issue in Truffle, and this might help someone else.
This can be done directly without using the path to the public folder.
You can do it like
<img src="/images/image-name" alt=""/>
This happens because we do not use App.js in the browser. Since index.html is executed in the browser itself and the path to images is already in the public folder containing index.html file
You don't need to eject, you can modify the react-scripts config with the rescripts library
This would work then:
module.exports = config => {
const scopePluginIndex = config.resolve.plugins.findIndex(
({ constructor }) => constructor && constructor.name === "ModuleScopePlugin"
);
config.resolve.plugins.splice(scopePluginIndex, 1);
return config;
};
Came to the same issue in my project, and found this in the official create-react-app docs: https://create-react-app.dev/docs/using-the-public-folder/
There is an "escape hatch" to add an asset outside the module system:
If you put a file into the public folder, it will not be processed by
webpack. Instead it will be copied into the build folder untouched. To
reference assets in the public folder, you need to use an environment
variable called PUBLIC_URL.
Here's an example they provide:
render() {
// Note: this is an escape hatch and should be used sparingly!
// Normally we recommend using `import` for getting asset URLs
// as described in “Adding Images and Fonts” above this section.
return <img src={process.env.PUBLIC_URL + '/img/logo.png'} />;
}
This worked for me without installing/ changing anything
Context: I got this error when I tried to generate a build using yarn run build
Things I have done between the working and failing of yarn run build
I updated my ant-design to the latest stable version (v4.23.5).
Note: I highly believe that there is nothing to do with this version. I am just mentioning it to add more details.
This answer solved my issue. But I have changed no imports that access something outside the src directory.
The changes include updated package.json, yarn.lock, new Antd implementations (change in props mainly).
It made no sense why the build command broke/ why the answer is working.
Solution here
As all the changes are related to package.json, yarn.lock. I deleted node_modules and clean installed all the packages.
Run
yarn
or
npm install
If you only need to import a single file, such as README.md or package.json, then this can be explicitly added to ModuleScopePlugin()
config/paths.js
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
module.exports = {
appPackageJson: resolveApp('package.json'),
appReadmeMD: resolveApp('README.md'),
};
config/webpack.config.dev.js + config/webpack.config.prod.js
module.exports = {
resolve: {
plugins: [
// Prevents users from importing files from outside of src/ (or node_modules/).
// This often causes confusion because we only process files within src/ with babel.
// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
// please link the files into your node_modules/ and let module-resolution kick in.
// Make sure your source files are compiled, as they will not be processed in any way.
new ModuleScopePlugin(paths.appSrc, [
paths.appPackageJson,
paths.appReadmeMD // README.md lives outside of ./src/ so needs to be explicitly included in ModuleScopePlugin()
]),
]
}
}
the best solution is to fork react-scripts, this is actually mentioned in the official documentation, see: Alternatives to Ejecting
If you need multiple modifications, like when using ant design, you can combine multiple functions like this:
const {
override,
removeModuleScopePlugin,
fixBabelImports,
} = require('customize-cra');
module.exports = override(
fixBabelImports('import', {
libraryName: 'antd',
libraryDirectory: 'es',
style: 'css',
}),
removeModuleScopePlugin(),
);
You can try using simlinks, but in reverse.
React won't follow simlinks, but you can move something to the source directory, and create a simlink to it.
In the root of my project, I had a node server directory that had several schema files in it. I wanted to use them on the frontend, so I:
moved the files /src
in the termal, I cd'ed into where the schema files belonged in server
ln -s SRC_PATH_OF_SCHEMA_FILE
This gave react what it was looking for, and node was perfectly happy including files through simlinks.
If you want to access CSS files from the public, you might face an error OUTSIDE OF SOURCE DIRECTORY
Alternatively, you can link this file in index.html which also resides in the public directory.
<link rel="stylesheet" href="App.css">
Here's an alternative that works well in simple cases (using fs and ncp). While developing, keep a script running that watches for changes to your shared folder(s) outside of /src. When changes are made, the script can automatically copy the shared folder(s) to your project. Here's an example that watches a single directory recursively:
// This should be run from the root of your project
const fs = require('fs')
const ncp = require('ncp').ncp;
ncp.limit = 16
// Watch for file changes to your shared directory outside of /src
fs.watch('../shared', { recursive: true }, (eventType, filename) => {
console.log(`${eventType}: ${filename}`)
// Copy the shared folder straight to your project /src
// You could be smarter here and only copy the changed file
ncp('../shared', './src/shared', function(err) {
if (err) {
return console.error(err);
}
console.log('finished syncing!');
});
})
This is an issue with the relative import, which might have caused because we've used "create-react-app project" command which forms a directory named project with node_modules folder and several other files in public and src folders inside it.
The create-react-app command puts a limitation that we can't import anything from outside src.
My Problem:
I had to import react-bootstrap css files which are created in node_modules folder outside the src folder.
I used import "../node_modules/bootstrap/dist/css/bootstrap.min.css"; but I got the error on terminal.
I found out that I can create a new react app and follow solution steps from A to G, in order to fix this issue.
Solution:
A) Create a new react app, using create-react-app new
B) cd new
C) run this command: "npm install react-bootstrap bootstrap#4.6.0" (without the "" double quotes )
D) in your react file put this to import bootstrap:
D.1) import "../node_modules/bootstrap/dist/css/bootstrap.min.css";
or
D.2)import Button from "react-bootstrap/Button";
E) create a bootstrap element like a Button or anything in your react file, for D.1) < button className="btn btn-success" > Bootstrap < /button>
or
for D.2) < Button variant="primary"> Bootstrap < /Button>
F) in terminal: cd src
G) in terminal: npm start,
this time it will be compiled successfully.
Reasoning:
I could see react-bootstrap working finally once I followed steps A to G in order, and this time I didn't get any error.
(I thought of this solution because:
I've used npm install "#material-ui/icons" and that got installed in the node_modules folder outside the src.
In my react file I've used import Add from "#material-ui/icons/Add"
and Material-ui icons were working fine for me,
but here also we are importing from outside src, from node_modules.. and everything works fine. Why there is no error of importing from outside src this time)
That's why I just created a new react app, and followed solution steps A to G.
If you want to set a background image using CSS. So you have to set the image using the URL of your's localhost and add the path of your image. Just see the example below.
.banner {
width: 100%;
height: 100vh;
background-image: url("http://localhost:3000/img/bg.jpg");
background-size: cover;
background-repeat: no-repeat;
}
Posting here what #Flaom wrote as a comment in the marked as reply answer and that actually saves lives:
"How is this the accepted answer? This bogus restriction is trivially eliminated by simply setting NODE_PATH=./src/.. in the .env file. By doing so, you can import from outside of the src folder without going through the pain associated with ejecting your app. "
Flaom
EDIT Added some more info as #cigien requested.
All the answers above describe very well why we cannot use an image from the public folder when we create our react app with the create-react-app. Having the issue myself and reading all these answers I realized that, what the answers say is to "hack" the app in order to remove the module that restricts us. Some of the answers don't even have an undo option. For a "training" application that is ok.
Personally I would not want to add a solution that alters the concept of the app to my own project, specially in a commercial one. #Flaom solution is the simplest and if anything change in the future it can be replaced with another solution. It has no risk, it can be removed anytime and is the simplest.
This was my code:
import React from 'react';
import './Navbar.scss';
import {images} from '../../constants';
const Navbar = () => {
return (
<nav>
<div>
< img src = {images.logo} alt = "logo" />
</div>
</nav>
);
}
export default Navbar;
Changed it too:
import React from 'react';
import './Navbar.scss';
import {images} from '././constants';
const Navbar = () => {
return (
<nav>
<div>
< img src = {images.logo} alt = "logo" />
</div>
</nav>
);
}
export default Navbar;
And it worked! Im getting better at fixing bugs haha.
If you file reside in public folder and if you want to import it without eject or without using react-app-rewired then in that case you can access file via domains name and the path of the file and using axios.
Example: There is a font file called favico.ico located inside public folder. You want to import it in one the file located in src. You
can access the font using following logic.
axios.get('example.com/favico.ico').then(() => {
// here you can access this file.
})
In above example example.com is domain. If you have different environment like localhost, staging, production then in that case the domain name is different.
So, to get the favico.ico you can use following logic.
axios.get(`${window.location.origin}/favico.ico`).then(() => {
// here you can access this file.
})
In above example you window.location.origin give you current domain meaning if you run your code locally then, it will give you http://localhost:{portnumber},
If your code run on production and production domain is example.com then, it will give you "example.com". So using this pattern you can access assets located in public folder.

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