About BabelIf we do not configure some rules, Babel only converts the new JavaScript syntax (syntax) instead of the new API, such as Iterator, Generator, Set, Maps, Proxy, Reflect, Symbol, Global objects such as Promise, as well as some methods defined on global objects (such as object.assign), are not transcoded. So, when such a code appears:const key = ‘babel‘ const obj = { [key]: ‘foo‘,}
Node: input node, after entering the REPL environment, you can run the Javascsript expression directly, simulate the node outputsh-it-nb0023:static xialei$ node> Console.log ('lallalala'); lallalalaundefinedBABEL-CLI: After the installation of BABEL-CLI, you can directly through the Babel command to Transcode, if the root directory must have. BABELRC--out-file or---out-file---out-dir or---out-dir --- D lib
implement more features.Webstorm Open ES6File-setting-languages Frameworks-javascriptIn the box on the right, select ECMASCRIPT6Babel settings in File WatcherThe path in the Webstorm: File-setting-tools-file Watcher,On the right side of the + sign open a new window, select Babel, in the middle of the picture will appear babel.Begin: Konjac: It seems that after
version.. BABELRCCreate the. babelrc file under the project root directory, which is the same directory as Package.json. "This file is not required"Many online tutorials recommend the contents as: {"presets": ["es2015"]}. The content here needs to be set according to your needs. Webstorm The default settings, in fact, do not need the online recommendation content.With. BABELRC, you can implement more features.Webstorm Open ES6File-setting-languages
compilation. If you do not write the conversion, it will be ineffective.
4. Plug-in configuration
It is very troublesome to write this parameter every time. You can create a configuration file. babelrc in the current directory.
However, in windows, you cannot right-click a file without a file name. You can use the cmd command line to create a file: Open cmd in the current folder and Type A command
Type nul>. babelrc
You can create a file. babelrc in
if the conversion is not written.
4, plug-in configuration
Write this argument every time it's a hassle. You can create a new profile in the current directory. BABELRC.
However, in Windows system, do not allow direct right to create files without file names, can be created through the cmd command line: Open cmd in the current folder and type the command
Type NUL>.BABELRC
You can create a file in the current directory. BABELRC, then write in the
Read CatalogueOne: Understand the Babel configuration file. BABELRC Basic Configuration ItemsTwo: Configure Babel in WebpackBack to TopOne: Understand the Babel configuration file. BABELRC Basic Configuration Items1. What is Babel? What is it used for?ES6 is the next generation of JavaScript language standards released
I. About BABEL
babelis the es6+ syntax compiler, official website: Www.babeljs.io, used to convert the old version of the browser unrecognized syntax and features into ES5 syntax, so that the code can apply more environment.
The initial babel use is very convenient, almost only with a small number of configurations can be used, but with the rapid upgrading of tools and code architecture,
, install Gulp on the bable plug-inNPM Install--save-dev Gulp-babel3. Install ES6 conversion ES5 plug-inNPM Install--save-dev babel-preset-es2015OK, after the module is installed, we will open the Package.json file we created just now, as follows:Can be clearly seen in the devdpendencies, we have just installed the module dependency.Next, the steps to configure gulpfile.js are similar to the "sledgehammer c
Let nodeJS support ES6 lexical ---- install and use babel, nodejses6
To use Babel, we need the node. js environment and npm. nodeJS is installed mainly, and npm is installed by default. Now it is easy to install node. js. Just download and install it directly;
Install es-checker
Before using Babel, we need to first check the current node's support for es6. We use
To use Babel, we need NODEJS environment and NPM, the main installation of Nodejs, NPM installed by default, now installed Nodejs is very simple, directly download the installation is good;Installing Es-checkerBefore using Babel, we need to check the current node support for ES6, we use the first Es-checker, the command line execution:Npm-g Install Es-checkerEs-checker after installation, command line execu
Webpack+babel+es6+react Environment Setup Step: 1 Create a project structure Note: First create a project directory react this name customization , and then go to this directory below mkdir App //Create app directory to hold project source files mkdir dist //Create dist directory to store packaged file Touch . Gitignore // Create. Gitignore to add git ignored files touch webpack.config.js //Create Webpack Profile CD app// enter into
Babel
Official Introduction: Convert ECMAScript 2015 and later JavaScript code to an older version of the browser or to a backward-compatible version of the JavaScript code in the environment.
In short, it's about converting incompatible JavaScript code into a compatible, executable JavaScript code.
Function:
Syntax conversions
Add some compatibility Polyfill features
source code conversion, etc.
Simple Configuration preview:
{
"
Free. netframework obfuscation tool Babel obfuscator GuiThe GUI tool of Babel obfuscatorThis tools support Babel obfuscator 1.3 and later:Most of the tools I found that can be used to obfuscate Silverlight Code are not free. but the Babel obfuscator by Albert to ferrazzoli is an op
configuration, These loader will parse files in different formats and then package them together into a JS file loaders: [ {test:/\.css$/, loader: ' style-loader! Css-loader '}, {test:/\.scss$/, loader: ' style!css!sass?sourcemap '}, {test:/\.styl$/, loader: ' Style-loader!css-loader!stylus-loader '}, {test:/\. ( Png|jpg) $/, loader: ' url-loader?limit=8192 '}, {test:/\.js$/, loader: "babel
' }] } }
Then create a file called by babel named. babelrc.
Write in
{ "presets": [ "es2015" ] }
Then open cmd in the current directory,
Run the webpack command.
If a green image is displayed, it indicates the operation is successful.
Go to the bin directory and find app. bundle. js. The code below is found.
function(module, exports) { "use strict"; var a = 111; var b = 222; var xxx = function xxx
This article mainly refers to Nanyi's ES6 introduction, in order to improve their own writing an essay.The original address please poke here ECMAScript 6 Getting StartedECMAScript 6 is the next generation of JavaScript language standards. Since the current version of ES6 was released in 2015, it is also called ECMAScript 2015.However, the browser is not fully compatible with ES6 and needs to be Babel compiled.Babel is a widely used ES6 transcoding dev
Today contacted Webpack, the first time to use Webpack to transcode, unexpectedly confused on success, haha.The following procedure is attachedCreate a folder, initialize it, first the global installation of WebpackNPM Install Webpack--save-dev Then install BabelNPM Install--save-dev babel-core babel-preset-es2015 npm Install--save-dev Babel-loader Perform the
Issues caused by low-version browsersRecently developed a project based on webpack+babel+react , generally local is in chrome browsing above development, Chrome browser development because support most of the new JS features, so generally do not need polyfill, such as Promise,string instance includes method. Even in the low version of the browser, through babel-runtime the Polyfill can also be converted, bu
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.