babel-preset-minify

Babel preset for all minify plugins.

+ Install
+ Usage
+ Options

Install

``sh
npm install babel-preset-minify --save-dev
`

Usage

$3

.babelrc

`json
{
"presets": ["minify"]
}
`

or pass in options -

`json
{
"presets": [["minify", {
"mangle": {
"exclude": ["MyCustomError"]
},
"unsafe": {
"typeConstructors": false
},
"keepFnName": true
}]]
}
`

$3

`sh
babel script.js --presets minify
`

$3

`javascript
const babel = require("@babel/core");
const fs = require("fs");

const code = fs.readFileSync("./input.js").toString();

const minified = babel.transform(code, {
presets: ["minify"]
});
`

Options

Two types of options:

1. 1-1 mapping with plugin
2. The same option passed to multiple plugins

#### 1-1 mapping with plugin

+ false - disable plugin
+ true - enable plugin
+ { ...pluginOpts } - enable plugin and pass pluginOpts to plugin

OptionName | Plugin | DefaultValue
---------- | ------ | ------------
booleans | [transform-minify-booleans][booleans] | true
builtIns | [minify-builtins][builtIns] | true
consecutiveAdds | [transform-inline-consecutive-adds][consecutiveAdds] | true
deadcode | [minify-dead-code-elimination][deadcode] | true
evaluate | [minify-constant-folding][evaluate] | true
flipComparisons | [minify-flip-comparisons][flipComparisons] | true
guards | [minify-guarded-expressions][guards] | true
infinity | [minify-infinity][infinity] | true
mangle | [minify-mangle-names][mangle] | true
memberExpressions | [transform-member-expression-literals][memberExpressions] | true
mergeVars | [transform-merge-sibling-variables][mergeVars] | true
numericLiterals | [minify-numeric-literals][numericLiterals] | true
propertyLiterals | [transform-property-literals][propertyLiterals] | true
regexpConstructors | [transform-regexp-constructors][regexpConstructors] | true
removeConsole | [transform-remove-console][removeConsole] | false
removeDebugger | [transform-remove-debugger][removeDebugger] | false
removeUndefined | [transform-remove-undefined][removeUndefined] | true
replace | [minify-replace][replace] | true
simplify | [minify-simplify][simplify] | true
simplifyComparisons | [transform-simplify-comparison-operators][simplifyComparisons] | true
typeConstructors | [minify-type-constructors][typeConstructors] | true
undefinedToVoid | [transform-undefined-to-void][undefinedToVoid] | true

#### The same option passed to multiple plugins

+ When multiple plugins require the same option, it's easier to declare it in one place. These options are passed on to two or more plugins.

OptionName | Plugins
---------- | -------
keepFnName | Passed to [mangle][mangle] & [deadcode][deadcode]
keepClassName | Passed to [mangle][mangle] & [deadcode][deadcode]
tdz | Passed to [builtIns][builtIns], [evaluate][evaluate], [deadcode][deadcode], [removeUndefined][removeUndefined]

Examples

`json
{
"presets": [["minify", {
"evaluate": false,
"mangle": true
}]]
}
`

`json
{
"presets": [["minify", {
"mangle": {
"exclude": ["ParserError", "NetworkError"]
}
}]]
}
`

`json
{
"presets": [["minify", {
"keepFnName": true
}]]
}
// is the same as
{
"presets": [["minify", {
"mangle": {
"keepFnName": true
},
"deadcode": {
"keepFnName": true
}
}]]
}
``

[booleans]: ../../packages/babel-plugin-transform-minify-booleans
[builtIns]: ../../packages/babel-plugin-minify-builtins
[consecutiveAdds]: ../../packages/babel-plugin-transform-inline-consecutive-adds
[deadcode]: ../../packages/babel-plugin-minify-dead-code-elimination
[evaluate]: ../../packages/babel-plugin-minify-constant-folding
[flipComparisons]: ../../packages/babel-plugin-minify-flip-comparisons
[guards]: ../../packages/babel-plugin-minify-guarded-expressions
[infinity]: ../../packages/babel-plugin-minify-infinity
[mangle]: ../../packages/babel-plugin-minify-mangle-names
[memberExpressions]: ../../packages/babel-plugin-transform-member-expression-literals
[mergeVars]: ../../packages/babel-plugin-transform-merge-sibling-variables
[numericLiterals]: ../../packages/babel-plugin-minify-numeric-literals
[propertyLiterals]: ../../packages/babel-plugin-transform-property-literals
[regexpConstructors]: ../../packages/babel-plugin-transform-regexp-constructors
[removeConsole]: ../../packages/babel-plugin-transform-remove-console
[removeDebugger]: ../../packages/babel-plugin-transform-remove-debugger
[removeUndefined]: ../../packages/babel-plugin-transform-remove-undefined
[replace]: ../../packages/babel-plugin-minify-replace
[simplify]: ../../packages/babel-plugin-minify-simplify
[simplifyComparisons]: ../../packages/babel-plugin-transform-simplify-comparison-operators
[typeConstructors]: ../../packages/babel-plugin-minify-type-constructors
[undefinedToVoid]: ../../packages/babel-plugin-transform-undefined-to-void