babel-plugin-transform-regexp-constructors

This changes RegExp constructors into literals if the RegExp arguments are strings.

Example

In

const foo = 'ab+';
var a = new RegExp(foo+'c', 'i');

Out

const foo = 'ab+';
var a = /ab+c/i;

npm install babel-plugin-transform-regexp-constructors --save-dev

.babelrc

{
  "plugins": ["transform-regexp-constructors"]
}

babel --plugins transform-regexp-constructors script.js

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