一、兼容电脑端的禁止通过 ctrl + +/- 和 ctrl + 滚轮 对页面进行缩放

const keyCodeMap = {// 91: true, // command61: true,107: true, // 数字键盘 +109: true, // 数字键盘 -173: true, // 火狐 - 号187: true, // +189: true, // -};

二、覆盖ctrl||command + ‘+’/‘-’

// 覆盖ctrl||command + ‘+’/‘-’document.onkeydown = function (event) {const e = event || window.event;const ctrlKey = e.ctrlKey || e.metaKey;if (ctrlKey && keyCodeMap[e.keyCode]) {e.preventDefault();} else if (e.detail) { // Firefoxevent.returnValue = false;}};

三、覆盖鼠标滑动

// 覆盖鼠标滑动document.body.addEventListener('wheel', (e) => {if (e.ctrlKey) {if (e.deltaY < 0) {e.preventDefault();return false;}if (e.deltaY > 0) {e.preventDefault();return false;}}}, { passive: false });

四、完整代码示例

/*** 采用覆盖键、覆盖鼠标滑动事件;禁止通过	ctrl + +/- 和 	ctrl + 滚轮 对页面进行缩放* */
window.onload = function () {/*** 兼容电脑端的禁止通过	ctrl + +/- 和 	ctrl + 滚轮 对页面进行缩放* */const keyCodeMap = {// 91: true, // command61: true,107: true, // 数字键盘 +109: true, // 数字键盘 -173: true, // 火狐 - 号187: true, // +189: true, // -};// 覆盖ctrl||command + ‘+’/‘-’document.onkeydown = function (event) {const e = event || window.event;const ctrlKey = e.ctrlKey || e.metaKey;if (ctrlKey && keyCodeMap[e.keyCode]) {e.preventDefault();} else if (e.detail) { // Firefoxevent.returnValue = false;}};// 覆盖鼠标滑动document.body.addEventListener('wheel', (e) => {if (e.ctrlKey) {if (e.deltaY < 0) {e.preventDefault();return false;}if (e.deltaY > 0) {e.preventDefault();return false;}}}, { passive: false });/*** 兼容iOS10以上Safari浏览器无法禁止缩放的解决方案* */// 阻止双击放大var lastTouchEnd = 0;document.addEventListener('touchstart', function (event) {if (event.touches.length > 1) {event.preventDefault();}});document.addEventListener('touchend', function (event) {var now = (new Date()).getTime();if (now - lastTouchEnd <= 300) {event.preventDefault();}lastTouchEnd = now;}, false);// 阻止双指放大document.addEventListener('gesturestart', function (event) {event.preventDefault();});
};