禁止ios网页缩放

1. meta

2. JS

   • 禁用双指缩放:

     document.documentElement.addEventListener('touchstart', function (event) {
       if (event.touches.length > 1) {
         event.preventDefault();
       }
     }, false);

   • 禁用手指双击缩放:

     var lastTouchEnd = 0;
     document.documentElement.addEventListener('touchend', function (event) {
       var now = Date.now();
       if (now - lastTouchEnd <= 300) {
         event.preventDefault();
       }
       lastTouchEnd = now;
     }, false);