"do...while" syntax semicolon

function getRandomNumber(upper) { return Math.floor( Math.random() * upper ) + 1; }

var randomNumber = getRandomNumber(10); var guess;

do { guess = parseInt(prompt('Guess the number: ')); } while ( guess !== randomNumber );

document.write('Congrats! the number was ' + randomNumber);

Hello community,

So, this is a short version of the challenge just to test one thing. For what I've read adding a semicolon after the "do-while" is often a style choice, and JavaScript is a loosely typed language. However, in my case with this code, if I don´t add the semicolon after the while condition, the result is an endless loop and the browser of course crashes.

So it looks like is not a style choice after all, or it depends on the browser version or something like that?, or am I missing something here?

Thanks very much!