Example of a simple Babel plugin

simple-babel-plugin.js

module.exports = function () {
  const SimpleVisitor = {
    StringLiteral(path, state) {
      if (path.node.value === "We'll never survive!") {
        path.node.value = "Nonsense. You're only saying that because no one ever has.";
      }
    },
  };
  
  return { visitor: SimpleVisitor };
};