网页怎么固定比例缩放（网页如何正确禁止缩放）

展厅的屏幕都是触控屏！

// Chrome IE 360

window.addEventListener('mousewheel', function (event) {

if (event.ctrlKey === true || event.metaKey) {

event.preventDefault()

}

}, {

passive: false

})

//禁止双指放大

document.documentElement.addEventListener('touchstart', function (event) {

if (event.touches.length > 1) {

event.preventDefault();

}

}, {passive:false});

// 禁止双击放大

let lastTouchEnd = 0;

document.documentElement.addEventListener('touchend', function (event) {

var now = Date.now();

if (now - lastTouchEnd <= 300) {

event.preventDefault();

}

lastTouchEnd = now;

}, {passive:false});

亲测有效！