PC端禁止用户缩放网页

1、禁止按住Ctrl，滑动鼠标滚轮缩放

document.addEventListener('mousewheel', function (e) {
	e = e || window.event;
	if ((e.wheelDelta && event.ctrlKey) || e.detail) {
		event.preventDefault();
	}
}, {
	capture: false,
	passive: false
});

2、禁止使用ctrl加+放大，ctrl加-缩小

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);