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

In

Out

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

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

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

boolean, defaults to .

When true, this transform will pretend document.all does not exist, and perform loose equality checks with null instead of strict equality checks against both null and undefined.

Example

In

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

Out

var _object$foo;