babel-plugin-minify-dead-code-elimination

Inlines bindings when possible. Tries to evaluate expressions and prunes unreachable as a result.

Example

In

``javascript
function foo() {var x = 1;}
function bar() { var x = f(); }
function baz() {
var x = 1;
console.log(x);
function unused() {
return 5;
}
}
`

Out

`javascript
function foo() {}
function bar() { f(); }
function baz() {
console.log(1);
}
`

Installation

`sh
npm install babel-plugin-minify-dead-code-elimination --save-dev
`

Usage

$3

.babelrc

`json
// without options
{
"plugins": ["minify-dead-code-elimination"]
}

// with options
{
"plugins": ["minify-dead-code-elimination", { "optimizeRawSize": true }]
}
`

$3

`sh
babel --plugins minify-dead-code-elimination script.js
`

$3

`javascript
require("@babel/core").transform("code", {
plugins: ["minify-dead-code-elimination"]
});
`

Options

+ keepFnName - prevent plugin from removing function name. Useful for code depending on fn.name
+ keepFnArgs - prevent plugin from removing function args. Useful for code depending on fn.length
+ keepClassName - prevent plugin from removing class name. Useful for code depending on cls.name
+ tdz` - Account for TDZ (Temporal Dead Zone)