babel-plugin-common-jsx v0.1.12

babel-plugin-common-jsx

babel-plugin-common-jsx is a babel plugin that can translate JSX syntax code into JavaScript. It translates the JSX syntax structure into the form of nested calling functions, and supports developers to specify the function name to be called, and also has full JSX syntax support.

This README is also available in other languages:

• 简体中文

Install

npm install --save-dev babel-plugin-common-jsx

Usage

.babelrc

{
  "plugins": [["babel-plugin-common-jsx", options]]
}

Options

• functionName: Function name to be called when creating a new JSX tag (default: 'createElement').

• fragmentName: Function name to be called when creating a new JSX fragment (default: 'createFragment').

• tagMode: Handle whether tag name is translated to variable reference:

  • normal: normal mode. Tag names starting with uppercase letters are translated to variable references, others are translated to strings, and the normal mode is used by default.

  • scope: scope mode. Find whether a variable with the same name as the tag exists in the local scope where the tag is located. If it exists, it is translated to a variable reference.

  • static: static mode. Need to provide an additional parameter staticTags describing which tag names should be translated to strings, while other tags are translated to variable references.

• staticTags: This parameter is required when the tagMode value isstatic. This parameter is an array of several strings. When the tag name is included in the array, the tag name is translated to a string.

example:

{
  "plugins": [
    [
      "babel-plugin-common-jsx", {
        "functionName": "createElement",
        "fragmentName": "createFragment",
        "tagMode": "normal"
      }
    ]
  ]
}

Example

JSXElement:

// Before
const el = <div></div>;
// After
const el = createElement("div", {}, []);

JSXFragment:

// Before
const el = <><div></div></>;
// After
const el = createFragment([createElement("div", {}, [])]);

JSXAttributes:

// Before
const el = <div foo="baz"></div>;
// After
const el = createElement("div", { foo: "baz" }, []);

JSXSpreadAttribute:

// Before
const el = <div foo {...props} bar="baz"></div>;
// After
const el = createElement("div", Object.assign({}, { foo: true }, props, { bar: "baz" }), []);

JSXChildExpression:

// Before
const el = <div>{<span></span>} {}</div>;
// After
const el = createElement("div", {}, [createElement("span", {}, [])]);

JSX syntax reference

Detail: Draft: JSX Specification

JSX syntax support

All syntaxes have been implemented except for JSXNamespacedName.

Test

npm run test

npm run test-coverage