New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

71.实现instanceof #71

Open

webVueBlog opened this issue Sep 16, 2022 · 0 comments

Member

webVueBlog commented Sep 16, 2022

function myInstanceof (L, R) {
 if (L === null || typeof L !== 'object' || typeof R !== 'function') {
   return false;
 }
 let O = R.prototype;
 L = Object.getPrototypeOf(L);
 while(true) {
  if (!L) return false;
  if (O === L) return true;
  L = Object.getProperty(L);
 }
}

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment