packages/babel-helper-regex/src/index.js
import pull from "lodash/pull";
export function is(node: Object, flag: string): boolean {
return node.type === "RegExpLiteral" && node.flags.indexOf(flag) >= 0;
}
export function pullFlag(node: Object, flag: string) {
const flags = node.flags.split("");
if (node.flags.indexOf(flag) < 0) return;
pull(flags, flag);
node.flags = flags.join("");
}