Ecmascript Proposal For Constructor Parameter Properties

In TypeScript, there is convenient syntax, constructor parameter properties: constructor(a, public b, private _c) {} Which is syntactic sugar for: constructor(a, b, _c) { this.b

Solution 1:

Are there proposals or other initiatives for constructor parameter properties in ECMAScript?

No.

Are there Babel transforms that support this or similar syntactic sugar?

Use typescript transform with babel : https://babeljs.io/docs/en/next/babel-preset-typescript.html

OR

Just use typescript by itself as that provides the transform 🌹