underscore.js

import * as React from "react";
import inflection from "inflection";

function getUnderscoreName(type) {
  type = inflection.underscore(type).replace(/__/g, "_");
  const parts = type.split("_");
  let typ = [];
  let needed = [];
  for (let i = 0; i < parts.length; i++) {
    if (parts[i].length === 1) {
      needed.push(i);
    } else {
      typ.push(needed.map((j) => parts[j]).join(""));
      needed = [];
      typ.push(parts[i]);
    }
  }
  typ.push(needed.map((j) => parts[j]).join(""));
  typ = typ.filter(Boolean);
  return typ.join("_");
}

export default function App() {
  return (
    <div className="App">{getUnderscoreName("GraphQLWebACLHelloWorld")}</div>
  );
}