babel/packages/babel-plugin-transform-react-inline-elements

babel-plugin-transform-react-inline-elements

Replaces the React.createElement function with one that is more optimized for production: babelHelpers.jsx.

Note

When used alongside transform-runtime, polyfills (by default including Symbol) are specifically scoped to not pollute the global scope. This breaks usage with React, as it won't have access to that polyfill and will cause your application to fail in legacy browsers.

Even if ['transform-runtime', { helpers: true, polyfill: false }] is specified, it might still break, since helpers come precompiled.

In this case, we recommend importing/requiring babel-polyfill in the entry point of your application and using babel-preset-env with the useBuiltIns option to only include the polyfills your targets need. Alternatively, you can also import/require core-js/modules/es6.symbol by itself.

This transform should be enabled only in production (e.g., just before minifying your code) because, although it improves runtime performance, it makes warning messages more cryptic and skips important checks that happen in development mode, including propTypes.

Example

In

<Baz foo="bar" key="1"></Baz>;

Out

babelHelpers.jsx(Baz, {
  foo: "bar"
}, "1");

/**
 * Instead of
 *
 * React.createElement(Baz, {
 *   foo: "bar",
 *   key: "1",
 * });
 */

Deopt

// The plugin will still use React.createElement when `ref` or `object rest spread` is used
<Foo ref="bar" />
<Foo {...bar} />

Installation

npm install --save-dev babel-plugin-transform-react-inline-elements

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["transform-react-inline-elements"]
}

Via CLI

babel --plugins transform-react-inline-elements script.js

Via Node API

require("babel-core").transform("code", {
  plugins: ["transform-react-inline-elements"]
});

References

• [facebook/react#3228] Optimizing Compiler: Inline React Elements