I'm currently using Webpack to manage configuration for my React JS app.
I have a config.development.json file that is loaded by my development build script. It contains
{
"primary1Color": "pink"
}
It's loaded in the Webpack script as follows
externals: {
configuration: JSON.stringify(require("./config.development.json"))
}
There's a similar set up for production builds.
I reference the config parameters in my app as follows
import configuration from "configuration";
const mainColor = configuration.primary1Color;
This is all working.
However, I'd like to allow the settings to be configured post-deployment---i.e. have the app read the config file when it runs. Then, if customers wish to change the color scheme, they can do so without me having to rebuild the app.
How can I get the app to dynamically load my JSON config file?
You don't have to bundle it with webpack. You can use normal ajax call to load the json or use script.js.
https://github.com/ded/script.js
However if you really want to use webpack loader, you can try external-loader.
https://github.com/sheerun/external-loader
More discussion here:
"Require external (unmanaged) file"
I think the best approach would be to create an API endpoint that react interacts with to load them.
Related
I setup react project by create-react-app and I found that the subfolder of react won't able to autoload when I create a new file, eg
<!-- file: /public/subfolder/index.html -->
<p>subfolder content here</p>
anyone knows how? According to the official react doc, it looks like react doesn't allow this kind pattern? Anyone knows more content?
This is not actually a restriction from React itself. That was how Webpack has configured in create-react-app. Please look at the below code snippet of a typical Webpack config file in a React application. If we need more custom configuration, we have to manually configure Webpack and Babel as per our requirements.
Link for the documentation: The best webpack configurations for React applications
Im trying to use the azure environment variables with my react build. So far I have an appsettings.json file that I load into react with:
import settings from './appsettings.json';
I then have webpack copy the json into build folder which goes to azure. However I think after build the app isnt actually loading the file as I can see some of my variables embedded in the "chunk.js" so its not actually reaching out the the json file in root anymore? Am I importing the file in the wrong way?
C
Two possible solutions:
var json = require('./data.json'); //with path
change your settings.json to settings.js and use module.exports = {} in it.
I believe azure would accept different forms of setting files, not limited to json.
I built a small React application that ultimately will be in a section on a page with other small apps. The way the system is architected requires that each app be a require module that exports an init function that when called will render the app into a div by id. I have already tweaked my React build so that I have a single js file. Now I'm trying to figure out if I can make this final build be somehow loadable with requirejs. I have found a lot of information about using requirejs as part of the build but I would rather be able to stay with the create-react-app way and maybe somehow add in the ability to do the output in an AMD way. I know this must seem silly but I can't otherwise get around the AMD architecture of this platform.
You can achieve this by tweaking the configuration of webpack.config.js file, you need to check out webpack's output.library options (library, libraryExport, and libraryTarget):
https://webpack.js.org/configuration/output#module-definition-systems
module.exports = {
//...
output: {
library: 'MyReactAppLibrary',
libraryTarget: 'amd'
}
}
I have a question regarding webpack and serving images.
I have a webpack config that build a React webapp and also serves .jpg files from a specific folder.
But what happens if from my webapp I download and add a new image to this folder?
Can I refresh webpack so that it will serve the new image and I will be able to import it with require.context?
Or, is it something that webpack is not supposed to do, and so I need to have this handled in the backend?
Thanks,
This isn't something that would typically be handled by Webpack. require.context creates references to all modules (or in this case images) in a directory that can be required with a request matching a regular expression, so if you were to use that, you'd need to recompile your app every time you add or remove an image from the folder.
It would be best to handle this in the backend, so you can just use the URLs to the images directly.
I want to do some conditional operations inside my angularjs application for different versions of my app. How do I import the version property of my bower/package.json file from my Angular app locally.
I seem to get module not founderror when trying to import the json file (actually anything that's not .ts file). I am not planning to use $http.get(..) to read the json file asynchronously nor installing node/express packages to use require module.
I want to simply use the ES6 or SystemJS module loader for doing this task. Thank you :)
Solution in AngularJS Controller:
var appVersion = require('electron').remote.app.getVersion();