h5 页面 禁止网页缩放
//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);