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    babel-plugin-transform-es2015-block-scoping

    6.26.0 • Public • Published

    babel-plugin-transform-es2015-block-scoping

    Compile ES2015 block scoping (const and let) to ES5

    Installation

    npm install --save-dev babel-plugin-transform-es2015-block-scoping

    Usage

    Via .babelrc (Recommended)

    .babelrc

    Without options:

    {
      "plugins": ["transform-es2015-block-scoping"]
    }

    With options:

    {
      "plugins": [
        ["transform-es2015-block-scoping", {
          "throwIfClosureRequired": true
        }]
      ]
    }

    Via CLI

    babel --plugins transform-es2015-block-scoping script.js

    Via Node API

    require("babel-core").transform("code", {
      plugins: ["transform-es2015-block-scoping"]
    });

    Options throwIfClosureRequired

    In cases such as the following it's impossible to rewrite let/const without adding an additional function and closure while transforming:

    for (let i = 0; i < 5; i++) {
      setTimeout(() => console.log(i), 1);
    }

    In extremely performance-sensitive code, this can be undesirable. If "throwIfClosureRequired": true is set, Babel throws when transforming these patterns instead of automatically adding an additional function.

    Keywords

    Install

    npm i babel-plugin-transform-es2015-block-scoping

    DownloadsWeekly Downloads

    1,960,160

    Version

    6.26.0

    License

    MIT

    Last publish

    Collaborators

    • hzoo
    • loganfsmyth
    • danez
    • existentialism