newUid() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/Entrypoint/Imports.ts lines 130–155

  newUid(name: string): string {
    /**
     * Don't call babel's generateUid for known hook imports, as
     * InferTypes might eventually type `HookKind` based on callee naming
     * convention and `_useFoo` is not named as a hook.
     *
     * Local uid generation is susceptible to check-before-use bugs since we're
     * checking for naming conflicts / references long before we actually insert
     * the import. (see similar logic in HIRBuilder:resolveBinding)
     */
    let uid;
    if (this.isHookName(name)) {
      uid = name;
      let i = 0;
      while (this.hasReference(uid)) {
        this.knownReferencedNames.add(uid);
        uid = `${name}_${i++}`;
      }
    } else if (!this.hasReference(name)) {
      uid = name;
    } else {
      uid = this.scope.generateUid(name);
    }
    this.knownReferencedNames.add(uid);
    return uid;
  }