jQuery代码，不了解 [英] jQuery code, not understanding

问题描述

我正在看这段代码，因为我是网页设计的新手，所以我无法理解它.

I am looking at this code and as I'm new to web design I'm unable to understand it.

因此，在我的索引页面上，我有一个指向google的链接，在ext.js页面上有以下代码.

So on my index page I have a link to google and the ext.js page the following code.

这是我所理解的，这是错误的.

This is what I understand which is wrong.

用户单击ok或cancel，因此变量c是ok或cancel.现在，我看不到if语句的意义，因为它是ok或cancel，换句话说，是true或false.

The user clicks ok or cancel, therefore the variable c is either ok or cancel. Now I don't see the point of the if statement, because it will be either ok or cancel on other words true or false.

$(window).unload(function(){
    var c = confirm('Are you sure you want to leave?');
    if(c){ 
        return true;
    }else{
        return false;
    }
});

推荐答案

变量c可以确定或取消

the variable c is either ok or cancel

否，它是true或false，取决于按下的是确定"还是取消"(或所涉及浏览器的本地i18ned版本).

No, it will be true or false depending on which of OK or Cancel (or whatever the local i18ned version is for the browser in question) was pressed.

我看不到if语句的要点

i dont seee the point of the if statement

没有意义.

return confirm('Are you sure you want to leave?');

…更简洁地给出相同的结果.

… gives the same result, much more concisely.

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