3 ms·

What exactly is happening here: "a.style.margin=++s+e%300"? (Specifically, the "++" part.)

• marpstar 11y ago
  increments `s` before evaluating the expression and adds it to (e % 300)
• username 11y ago
  ++ will increment s before the new margin is set.
• SapphireSun 11y ago
  s += 1 a.style.margin = (s + e) % 300
• mgraczyk 11y ago
  Increment global state variable, add it to e, which is the number of milliseconds the game has been running modulo 300. Then set the margin size to that value. It's a simple pseudo-pseudorandom number generator.
• andrewmunsell 11y ago
  In case any one was wondering the difference between "s++" and "++s" (the former of which is probably more common), prepending the "++" increments the variable before returning it, whereas appending it would increment after returning the value. The code you posted is essentially equivalent to "s = s + 1; a.style.margin = s + e % 300".