浏览器缩放

移动端：

<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0;" name="viewport" />

pc端：

<script>
    document.addEventListener('DOMContentLoaded', function(event) {
        //chrome浏览器
        document.body.style.zoom = 'reset';
        document.addEventListener('keydown', function(e) {
            if ((e.ctrlKey === true || e.metaKey === true) &&
                (e.which === 61 || e.which === 107 || e.which === 173 || e.which === 109 ||
                    e.which === 187 || e.which === 189)) {
                e.preventDefault();
            }
        }, false);
        document.addEventListener('mousewhell DOMMouseScroll', function(e) {
            if (e.ctrlKey === true || e.metaKey === true) {
                e.preventDefault();
            }
        }, false);
    }, false);

    window.addEventListener('mousewheel', function(event) {
        if (event.ctrlKey === true || event.metaKey) {
            event.preventDefault();
        }
    }, {
        passive: false
    });

    //firefox
    window.addEventListener('DOMMouseScroll', function(event) {
        if (event.ctrlKey === true || event.metaKey) {
            event.preventDefault();
        }
    }, {
        passive: false
    });
</script>