babel/packages/babel-plugin-transform-nullish-coalescing-operator

@babel/plugin-transform-nullish-coalescing-operator

Replace ?? with an inline helper.

Example

In

var foo = object.foo ?? "default";

Out

var _object$foo;

var foo = (_object$foo = object.foo, _object$foo !== null && _object$foo !== void 0 ? _object$foo : "default");

NOTE: We cannot use != null here because document.all == null and document.all has been deemed not "nullish".

Installation

npm install --save-dev @babel/plugin-transform-nullish-coalescing-operator

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["transform-nullish-coalescing-operator"]
}

Via CLI

babel --plugins transform-nullish-coalescing-operator script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["transform-nullish-coalescing-operator"]
});