node package manager

@pnidem/babel-preset-babili

babel-preset-babili

Babel preset for all minify plugins.

Install

npm install --save-dev babel-preset-babili

Usage

Via .babelrc (Recommended)

.babelrc

{
  "presets": ["babili"]
}

or pass in options -

{
  "presets": [["babili", {
    "mangle": {
      "blacklist": ["MyCustomError"]
    },
    "unsafe": {
      "typeConstructors": false
    },
    "keepFnName": true
  }]]
}

Via CLI

babel script.js --presets babili

Via Node API

require("babel-core").transform("code", {
  presets: ["babili"]
});

Options

All options are enabled by default except the ones with an explicit mention - (Default: false)

Three types of options:

1-1 mapping with plugin

  • false to disable the plugin
  • true to enable the plugin with default plugin specific options
  • { ...pluginOpts } to enable the plugin with custom plugin options

The following options have 1-1 mapping with a plugin,

Examples

{
  "presets": [["babili", {
    "evaluate": false,
    "mangle": true
  }]]
}
{
  "presets": [["babili", {
    "mangle": {
      "blacklist": {
        "ParserError": true,
        "NetworkError": false
      }
    }
  }]]
}

Option groups

  • false to disable the entire group
  • true to enable every plugin in the group
  • { pluginKey: <1-1 mapping> } - enable/disable a particular plugin in a group (or) pass options to that plugin

The following are groups of plugins -

Examples

Disables all unsafe plugins:

{
  "presets": [["babili", {
    "unsafe": false
  }]]
}

Disables only minify-guarded-expressions, and enable all other unsafe plugins:

{
  "presets": [["babili", {
    "unsafe": {
      "guards": false
    }
  }]]
}

Passing same plugin options to multiple plugins

In babili, multiple plugins require the same set of options and it is easier to mention it in one place instead of two.

  • keepFnName - This will be passed to mangle and deadcode and will NOT be overriden if the same option exists under either mangle or deadcode.

Examples

{
  "presets": [["babili", {
    "keepFnName": true
  }]]
}

is the same as,

Plugins applied:

{
  "presets": [["babili", {
    "mangle": {
      "keepFnName": true
    },
    "deadcode": {
      "keepFnName": true
    }
  }]]
}