5to6-codemod 中文文档教程

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5to6-codemod

codemods 的集合，可让您从 ES5 转换 JavaScript 代码使用 jscodeshift 到 ES6。

Usage

1. npm install -g jscodeshift
2. npm install 5to6-codemod
3. jscodeshift -t node_modules/5to6-codemod/transforms/[transform].js [files]
4. Review changes via git diff. Keep what you want, throw it out if you don't. Magic!

Option flags

执行codemods时，可以这样配置选项：

jscodeshift -t node_modules/5to6-codemod/transforms/[transform].js [files] --key=value

Recast options

我们的transform会自动区分并通过通过 jscodeshift 重铸配置键。 Recast 配置的官方文档可以在此处找到。 我们目前支持以下 Recast 密钥：

• esprima
• inputSourceMap
• lineTerminator
• quote
• range
• reuseWhitespace
• sourceFileName
• sourceMapName
• sourceRoot
• tabWidth
• tolerant
• trailingComma
• useTabs
• wrapColumn

Transforms

• amd - Transforms AMD style modules to ES6 import/export
• cjs - Transforms CommonJS style require() calls to ES6 import statements
  • This transformation accepts the following option flags:
    • hoist: Enables hoisting require statements to the top
• no-strict - Removes "use strict" statements
• exports - Move CommonJS style module.exports statements to ES6 export statements
• named-export-generation - Adds named exports corresponding to default export object keys. Only valid for ES6 modules exporting an object as the default export.
• let - Replace all var calls to use let
• simple-arrow - Replace all function expressions with a body of a sole return statement into arrow functions

Known issues

• Can't automagically figure out when you want to use import * as varName.
• End-of-line comments also missing in many situations
• simple-arrow loses comments in the function expression body