@babel/plugin-proposal-throw-expressions

Example

function test(param = throw new Error('required!')) {
  const test = param === true || throw new Error('Falsey!');
}

npm install --save-dev @babel/plugin-proposal-throw-expressions

.babelrc

{
  "plugins": ["@babel/plugin-proposal-throw-expressions"]
}

babel --plugins @babel/plugin-proposal-throw-expressions script.js

require("@babel/core").transform("code", {
  plugins: ["@babel/plugin-proposal-throw-expressions"]
});