通过js禁止ctrl+滚轮放缩浏览器页面，禁止用手势放大

禁止ctrl + ‘+’ 和ctrl + '-'
ctrl + + 放大, ctrl + - 缩小
61
107 +
109 -
173 静音
187 =+
189 -_
代码：
document.addEventListener(‘keydown’, function (event) {
if ((event.ctrlKey === true || event.metaKey === true)
&& (event.keyCode === 61 || event.keyCode === 107
|| event.keyCode === 173 || event.keyCode === 109
|| event.keyCode === 187 || event.keyCode === 189)) {
event.preventDefault();
}
}, false);
ctrl+滚轮缩放
不加passive: false，还是会执行缩放
document.addEventListener(‘mousewheel’, function (e) {
e = e || window.event;
if ((e.wheelDelta && event.ctrlKey) || e.detail) {
event.preventDefault();
}
}, {passive: false}
);
禁止手势缩放
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});