99be60b53d
* Implement transform for nullish-coalescing operator * Update example output * Switch from BinaryExpression to LogicalExpression * Address review comments - Use generateUidIdentifierBasedOnNode - Inline "??" - Clone ref node - Move "??" to LogicalExpression in babel-types * Fix reference to @babel/helper-plugin-test-runner * Fix reference to @babel/plugin-syntax-nullish-coalescing-operator * Don't use parent scope * Remove .vscode from .gitignore, change 'lib/index.js' to 'lib' * Ensure `document.all ?? 0 === document.all` * Fix note and copy to an inline comment
@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
!= nullhere becausedocument.all == nullanddocument.allhas 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"]
});