$ npm install babel-plugin-minify-dead-code-elimination
Inlines bindings when possible. Tries to evaluate expressions and prunes unreachable as a result.
In
function foo() {var x = 1;}
function bar() { var x = f(); }
function baz() {
var x = 1;
console.log(x);
function unused() {
return 5;
}
}
Out
function foo() {}
function bar() { f(); }
function baz() {
console.log(1);
}
npm install babel-plugin-minify-dead-code-elimination --save-dev
.babelrc
(Recommended).babelrc
// without options
{
"plugins": ["minify-dead-code-elimination"]
}
// with options
{
"plugins": ["minify-dead-code-elimination", { "optimizeRawSize": true }]
}
babel --plugins minify-dead-code-elimination script.js
require("@babel/core").transform("code", {
plugins: ["minify-dead-code-elimination"]
});
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
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