IE6/7 中的 jKey jQuery 插件错误，每当按下任何未使用的键时都会尝试运行。 如何战斗？

Question

I'm using the jKey jQuery plugin on a current project. It just allows you to easily run a function on a key press. Here's my function call:

jQuery(document).jkey('left, right',function(key){
    if(key == 'left'){
        if (elementIndex == 0) { return; }
        question_nav(jQuery('.question-fieldset-active'), 'prev');
    } else {
        if ((elementIndex + 1) == jQuery('.question-fieldset').length) { return; }
        question_nav(jQuery('.question-fieldset-active'), 'next');
    }
});

In IE6 and 7, pressing any other key on the keyboard besides the left or right arrows throws a nasty "Error Message: 'indexOf' is null or not an object" error. Is there a way to capture all other key presses and return; on them so as to avoid this?

Answer 1

Actually it's bug of jKey itself. I've found this bug, when tried to use at the project. That was classic problem with looping through array as object:

line 224 : for(y in keySplit[x]) at

The solution is to traverse array as traditional loop:

for(var i = 0; i < keySplit.length; ++i)

So u can do it manually or get fixed version of 'jquery.jkey.js' from my

Answer 2

Instead of just using else condition check for key == 'right' as well that might help you.

jQuery(document).jkey('left, right',function(key){
    if(key == 'left'){
        if (elementIndex == 0) { return; }
        question_nav(jQuery('.question-fieldset-active'), 'prev');
    } else if(key == 'right') {
        if ((elementIndex + 1) == jQuery('.question-fieldset').length) { return; }
        question_nav(jQuery('.question-fieldset-active'), 'next');
    }
});