Babel Preset Jsx

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This preset always includes the following plugins:. And with the development option:. Classic runtime adds:.

Automatic runtime (since v7.9.0) adds the functionality for these plugins automatically when the development option is enabled. If you have automatic runtime enabled, adding @babel/plugin-transform-react-jsx-self or @babel/plugin-transform-react-jsx-source will error.

11 Versions

Note: Flow syntax support is no longer enabled in v7.

For that, you will need to add the Flow preset.

Prerequisite

Example

Current Tags

What is JSX?

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13 Versions

isTSX

You can also check out the React Getting Started page. Without options:.

classic | automatic, defaults to classic. Added in: v7.9.0. Decides which runtime to use. automatic auto imports the functions that JSX transpiles to. classic does not automatic import anything. boolean, defaults to false.

jsxPragma

This toggles behavior specific to development, such as adding __source and __self.

This is useful when combined with the env option configuration or js config files. boolean, defaults to true. Toggles whether or not to throw an error if a XML namespaced tag name is used.

jsxPragmaFrag

Though the JSX spec allows this, it is disabled by default since React's JSX does not currently have support for it.

string, defaults to react. Added in: v7.9.0. Replaces the import source when importing functions. string, defaults to React.createElement.

allExtensions

Replace the function used when compiling JSX expressions.

string, defaults to React.Fragment. Replace the component used when compiling JSX fragments. boolean, defaults to false. Will use the native built-in instead of trying to polyfill behavior for any plugins that require one.

allowNamespaces

boolean, defaults to false. Added in: v7.7.0. When spreading props, use inline object with spread elements directly instead of Babel's extend helper or Object.assign.

Note: the env option will likely get deprecated soon.

You can read more about configuring preset options here.

allowDeclareFields

Configurable preset for Vue JSX plugins. This repo is only compatible with Babel 7.x, for 6.x please use vuejs/babel-plugin-transform-vue-jsx.

Install the dependencies:. In your babel.config.js:.

You can toggle specific features, by default all features (except compositionAPI) are enabled, e.g.:.

compositionAPI - Enables @vue/babel-sugar-composition-api-inject-h and @vue/babel-sugar-composition-api-render-instance, support returning render function in setup.

disallowAmbiguousJSXLike

@vue/babel-sugar-functional-vue - Functional components syntactic sugar. @vue/babel-sugar-inject-h - Automatic . [email protected]/babel-sugar-inject-h - Automatic h injection syntactic sugar.

@vue/babel-sugar-v-model - . [email protected]/babel-sugar-v-model - vModel syntactic sugar.

@vue/babel-sugar-v-on - . [email protected]/babel-sugar-v-on - vOn syntactic sugar. latest (2 years ago) . 1.0.0-beta.3.. 1.0.0-beta.2.. 1.0.0-beta.1.. BabelJs Tutorial. BabelJs Useful Resources. Selected Reading. In this chapter, we will understand working with JSX and babel. Before we get into the details, let us understand what JSX is.

onlyRemoveTypeImports

JSX is a JavaScript code with a combination of xml syntax in it.

JSX tag has tag name, attributes and children which make it look like xml.

React uses JSX for templating instead of regular JavaScript. It is not necessary to use it, however, following are some pros that come with it. It is faster because it performs optimization while compiling code to JavaScript.

optimizeConstEnums

It is also type-safe and most of the errors can be caught during compilation.

It makes it easier and faster to write templates, if you are familiar with HTML.

We have used babel 6 in the project setup. In case you want to switch to babel 7, install the required packages of babel using @babel/babel-package-name.

We will create project setup and use webpack to compile jsx with react to normal JavaScript using Babel. To start the project setup, run the commands given below for babel, react and webpack installation.

Now, we will install the necessary packages we need to work with – babel ,webpack and jsx −. Here is the package.json after installation −. Now will create a webpack.config.js file, which will have all the details to bundle the js files and compile it into es5 using babel.

To run webpack using server, there is something called webpack-server.