@babel/plugin-proposal-json-strings

Examples

const ex = "before
after";
//                ^ There's a U+2028 char between 'before' and 'after'

Out

const ex = "before\u2028after";
//                ^ There's a U+2028 char between 'before' and 'after'

npm install --save-dev @babel/plugin-proposal-json-strings

.babelrc

{
  "plugins": ["@babel/plugin-proposal-json-strings"]
}

babel --plugins @babel/plugin-proposal-json-strings script.js

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