Disable scale ( zoom ) on ios safari, firmware above 10?

Question

css

on ios devices, the ban on scale through the viewport does not work, help!
put this meta tag

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" />

Answer 1

document.addEventListener('touchmove', function (event) {
  if (event.scale !== 1) { event.preventDefault(); }
}, false);