I'm using function form of "use strict" and don't want global form which Babel adds after transpilation. The problem is I'm using some libraries that aren't using "use strict" mode and it might throw error after scripts are concatenated
As it has already been mentioned for Babel 6, it's the transform-es2015-modules-commonjs preset which adds strict mode.
In case you want to use the whole es2015 preset without module transformations, put this in your .babelrc file:
{
"presets": [
["es2015", { "modules": false }]
]
}
This will disable modules and strict mode, while keeping all other es2015 transformations enabled.
Babel 5
You'd blacklist "useStrict". For instance here's an example in a Gruntfile:
babel: {
options: {
blacklist: ["useStrict"],
// ...
},
// ...
}
Babel 6
Since Babel 6 is fully opt-in for plugins now, instead of blacklisting useStrict, you just don't include the strict-mode plugin. If you're using a preset that includes it, I think you'll have to create your own that includes all the others, but not that one.
There's now a babel plugin that you can add to your config that will remove strict mode: babel-plugin-transform-remove-strict-mode. It's a little ugly in that the "use strict" gets added and then removed, but it makes the config much nicer.
Docs are in the GitHub repo:
https://github.com/genify/babel-plugin-transform-remove-strict-mode
Your .babelrc ends up looking like this:
{
"presets": ["env"],
"plugins": ["transform-remove-strict-mode"]
}
I also came accross this rather ridiculous limitation that you cannot disable or overwrite settings from an existing preset, and have resorted to using this preset instead: https://www.npmjs.com/package/babel-preset-es2015-without-strict
plugins: [
[
require("#babel/plugin-transform-modules-commonjs"),
{
strictMode: false
}
],
]
You can tell babel that your code is a script with:
sourceType: "script"
in your babel config file. This will not add use strict. See sourceType option docs
Source: https://github.com/babel/babel/issues/7910#issuecomment-388517631
Babel 6 + es2015
We can disabled babel-plugin-transform-es2015-modules-commonjs to require babel-plugin-transform-strict-mode.
So comment the following code in node_modules/babel-plugin-transform-es2015-modules-commonjs/lib/index.js at 151 line
//inherits: require("babel-plugin-transform-strict-mode"),
just change .babelrc solution
if you don't want to change any npm modules, you can use .babelrc ignore like this
{
"presets": ["es2015"],
"ignore": [
"./src/js/directive/datePicker.js"
]
}
ignore that file, it works for me!
the ignored file that can't use 'use strict' is old code, and do not need to use babel to transform it!
Personally, I use the gulp-iife plugin and I wrap IIFEs around all my files. I noticed that the babel plugin (using preset es2015) adds a global "use strict" as well. I run my post babel code through the iife stream plugin again so it nullifies what babel did.
gulp.task("build-js-source-dev", function () {
return gulp.src(jsSourceGlob)
.pipe(iife())
.pipe(plumber())
.pipe(babel({ presets: ["es2015"] }))// compile ES6 to ES5
.pipe(plumber.stop())
.pipe(iife()) // because babel preset "es2015" adds a global "use strict"; which we dont want
.pipe(concat(jsDistFile)) // concat to single file
.pipe(gulp.dest("public_dist"))
});
This is not grammatically correct, but will basically work for both Babel 5 and 6 without having to install a module that removes another module.
code.replace(/^"use strict";$/, '')
Since babel 6 you can install firstly babel-cli (if you want to use Babel from the CLI ) or babel-core (to use the Node API). This package does not include modules.
npm install --global babel-cli
# or
npm install --save-dev babel-core
Then install modules that you need. So do not install module for 'strict mode' in your case.
npm install --save-dev babel-plugin-transform-es2015-arrow-functions
And add installed modules in .babelrc file like this:
{
"plugins": ["transform-es2015-arrow-functions"]
}
See details here: https://babeljs.io/blog/2015/10/31/setting-up-babel-6
For babel 6 instead of monkey patching the preset and/or forking it and publishing it, you can also just wrap the original plugin and set the strict option to false.
Something along those lines should do the trick:
const es2015preset = require('babel-preset-es2015');
const commonjsPlugin = require('babel-plugin-transform-es2015-modules-commonjs');
es2015preset.plugins.forEach(function(plugin) {
if (plugin.length && plugin[0] === commonjsPlugin) {
plugin[1].strict = false;
}
});
module.exports = es2015preset;
Please use "es2015-without-strict" instead of "es2015". Don't forget you need to have package "babel-preset-es2015-without-strict" installed. I know it's not expected default behavior of Babel, please take into account the project is not mature yet.
I just made a script that runs in the Node and removes "use strict"; in the selected file.
file: script.js:
let fs = require('fs');
let file = 'custom/path/index.js';
let data = fs.readFileSync(file, 'utf8');
let regex = new RegExp('"use\\s+strict";');
if (data.match(regex)){
let data2 = data.replace(regex, '');
fs.writeFileSync(file, data2);
console.log('use strict mode removed ...');
}
else {
console.log('use strict mode is missing .');
}
node ./script.js
if you are using https://babeljs.io/repl (v7.8.6 as of this writing), you can remove "use strict"; by selecting Source Type -> Module.
Using plugins or disabling modules and strict mode as suggested in the #rcode's answer didn't work for me.
But, changing the target from es2015|es6 to es5 in tsconfig.json file as suggested by #andrefarzart in this GitHub answer fixed the issue.
// tsconfig.json file
{
// ...
"compilerOptions": {
// ...
"target": "es5", // instead of "es2015"
}
I have built an application with electron-builder. There was a video in media folder in the development area. But when I built the application I figure out the video folder replaced with asar file in a resource folder in C://Programs.
I want videos to have in media folder in production. How can I do that
You may want to try with asar: false in your package.json file. But, this is not the recommended way to do it.
The best you can do is to add the resources you want to keep outside the asar file with the extraResources directive:
"build": {
"extraResources": [
{
"from": "../media",
"to": "media",
"filter": [
"**/*",
"!*.mp3",
]
}
],
"asar": false,
}
The accepted answer did not work for me... What did work was to specify the directory whose contents I wanted to access post-build in the same format as specified for the files configuration.
electron-builder.json:
{
...
"extraResources": [
"src/assets/my-assets/*"
],
...
}
After the build, you will find your folder at the same location as the asar file (.../app/resources/src/assets/my-assets), under resources. There's no need to specify asar: false.
On the main process, if you use __dirname, it will end with app.asar. The assets can be accessed using:
// Removing 8 characters to remove "app.asar"
let strippedPath = __dirname.substring(0, __dirname.length - 8);
let execPath = '\"' + strippedPath + 'src\\assets\\my-assets' + '\"';
Now execPath can be appended to with whatever needs to be executed from the assets folder.
#angular/cli#7+ allows a customWebpackConfig to be specified to provide custom webpack configuration, such as:
"architect": {
"build": {
"builder": "#angular-builders/custom-webpack:browser",
"options": {
"customWebpackConfig": {
"path": "./build/custom-webpack.config.js",
"mergeStrategies": {
"externals": "prepend"
}
},
...
This file then technically allows you to prepend, append or replace any portion of the webpack configuration. Prior to upgrading to #angular#7.1.3 and #angular/cli#7.1.3 we had ejected the webpack configuration to make some additions. One such addition was the postcss-momentum-scrolling postcss-loader plugin that automatically enabled iOS momentum scrolling on all scrollable containers.
I am seeking support on figuring out how to generate the necessary custom webpack code to load this plugin via the supported customizations allowed by #angular/cli#7+.
Here is a sample of what I have tried in my custom-webpack.config.js file:
const postcssMomentumScrolling = require('postcss-momentum-scrolling');
module.exports = {
module: {
rules: [
{
test: /\.scss$|\.sass$/,
use: [
{
"loader": "postcss-loader",
"options": {
"plugins": [
postcssMomentumScrolling(),
]
}
}
]
},
],
},
};
As soon as I touch the scss chunk of the webpack config, it seems to do a replace instead of a merge or prepend, breaking the build.
I am wondering if anyone has a guide or suggestions on how to see what the initial webpack configuration that #angular/cli generates that is the starting point for modifications and a way to preview/peek at the code to be executed as debugging.
Also, an example of a similar customization would be great.
Thanks!
I think you need to tell to "customWebpackConfig" which portion to merge. Like this:
"mergeStrategies": {
"module.rules": "prepend"
}
In this way you're going to tell to merge with prepend strategy.
According to "custom-webpack" documentation it should default to "append" which doesn't seem the case in your example.
It's been a while since you've put the question but I wanted to actually ask if you have been able to fix it since I'm running in some issues getting my "module.rules" merged...it seems to work only if I set "replace" strategy.
I would like to ask a question about CommonsChunkPlugin
const path = require('path');
const webpack = require('webpack');
module.exports = {
entry: {
vendor: ['moment'],
app: ['./www/build/main.js']
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].bundle.js'
},
module: {
rules: [
{ test: /\.(js)$/, use: 'babel-loader' }
]
},
plugins: [
new webpack.optimize.CommonsChunkPlugin({
name: 'chunk'
})
]
}
After i run the webpack script, there are 3 files generated (vendor.bundle, app.bundle, chunk.bundle). My questions are:
What is the usage chunk.bundle and why it is generated? I set the config in "entry" and output is depends on the [name] of entry
How can i run the script to all files under a folder? The current setting needs to input one by one.
If my file is too large, how can i split is into some smaller files?
Thanks.
1) The chunk.bundle.js is being generated by the plugin. It operates a little outside of the usual Webpack flow.
2) Not sure what you're getting at, here. You probably need to look at the minChunks setting, or chunks.
3) You can use multiple instances of the plugin. I've found that you have to use the chunks setting on every instance except for one to avoid getting an error. Basically that specifies on what entry files the plugin will operate. You can specify all your entry files in chunks, and then use a function with minChunks to filter out what you want to include in that file.
I'm using electron-react-boilerplate to develop electron app (which uses electron-builder to pack apps).
I want to create tray, but it requires icon path or native image. The question is how to retrieve icon image from electron-builder or how to tell electron-builder to include icons dir into resources (without packing), so I can use:
appIcon = new Tray(iconPath | nativeImage)
I kind of struggled with a solution about non-packaged assets (such as media or JSON config files), mostly because I was not familiar with Electron until now. :)
I built a simple personal tray-only app and I didn't want to repackage every time I change an icon for instance.
If you too plan on using changing/dynamic assets you can distinguish between "development" and "production" using this property:
https://electronjs.org/docs/api/app#appispackaged-readonly
Make sure you have this in your package.json:
"build": {
...
"extraResources": [
"./assets/**"
],
}
https://www.electron.build/configuration/contents#extraresources
Then in your code you can have:
const assetsPath = app.isPackaged ? path.join(process.resourcesPath, "assets") : "assets";
Of course you can also use a different path for storing assets, independent of your packaged app folder, for example your user's home or user's documents:
https://electronjs.org/docs/api/app#appgetpathname
Electron v7.0.1
electron-builder 21.2.0
Firstly you need to tell electron-builder which extra files need copying into your output build. I copy over native drivers for each os like below, but you should be able to adapt this to your needs. The "to": "resources" means you'll be able to use the next code to find the files later.
"build": {
...
"extraFiles": [
{
"from": "resources/${os}/drivers",
"to": "resources",
"filter": [
"**/*"
]
}
],
Then to get access to that path from in electron you can use:
const path = require('path');
const imgPath = path.join(process.resourcesPath, 'image.png')
If you're in the main process you can omit the remote part.
You can then use nativeImage.createFromPath to get a native image:
const nativeImage = require('electron').nativeImage
let image = nativeImage.createFromPath(imgPath)
Thanks, Tim, your answer gave me a good thought. I reused it with some addition depending on how I run my app - form vs code using electron or from installed deb file:
"build": {
...
"extraFiles": [
{
"from": "assets",
"to": "resources",
"filter": [
"**/*"
]
}
]
...
}
And then:
let imgPath = process.env.DEV ? "assets/icon.png" : path.join(process.resourcesPath, "icon.png");
tray = new Tray(imgPath);