在IE7(jQuery/JS)中禁用页面缩放 [英] Disabling page zoom in IE7 (jQuery/JS)

问题描述

鉴于可访问性，我知道这不是最好的选择，但是我确实有必要禁止用户使用IE7中的CTRL +缩放页面.

I know this is not the best thing to do in view of accessibility, but I have a genuine need to disable the user from zooming onto the page using CTRL+ in IE7.

我通过以下方式将其用于其他浏览器，但IE7似乎忽略了"return false":

I got it working for the other browsers the following way, but IE7 seems to ignore the "return false":

$(window).keydown(function (e) {

     alert('key is down');   // this fires          
     return false;          // but this has no effect in IE7!
});

推荐答案

这是更好且正确的方法:

This is better and correct way:

$(document).ready(function() {
    var ctrl = false;
    $(document).keydown(function(e){    
        // disable ctrl + +/-
        if(ctrl && (e.keyCode == 107 || e.keyCode == 109)) {
            alert('Zoom is disabled!');
            return false;
        }
        if(e.keyCode == 17) {
            ctrl = true;

            // disable ctrl + scroll
            $(document).bind('scroll', function() {
                if(ctrl) {
                    alert('Zoom is disabled!');
                    return false;
                }                               
            });
        }
    })

    $(document).keyup(function(e) {
        if(e.keyCode == 17) {
            ctrl = false;
            $(document).unbind('scroll');
        }                  
    });                    
});

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