generate random string for div id

Question

I want to display YouTube videos on my website, but I need to be able to add a unique id for each video that\'s going to be shared by users. So I put this toget

Answer 1

Based on HTML 4, the id should start from letter:

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

So, one of the solutions could be (alphanumeric):

  var length = 9;
  var prefix = 'my-awesome-prefix-'; // To be 100% sure id starts with letter

  // Convert it to base 36 (numbers + letters), and grab the first 9 characters
  // after the decimal.
  var id = prefix + Math.random().toString(36).substr(2, length);

Another solution - generate string with letters only:

  var length = 9;
  var id = Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, length);