javascript - 我如何将此 jQuery 代码转换为 jQuery 函数？

Question

我有一些 jQuery 代码，一次又一次地重复，我想通过将其转换为函数来减少我正在编写的代码。这是我正在使用的代码。

$('form#save-user button[name="save-user"]').click(function() {
    var formData = 'option=saveuser&'+$('form#save-user').serialize();
    $.ajax({
        type: 'POST',
        url:  'process.php',
        data: formData,
        success: function(msg){
            if(msg === 'empty') {
                alert('Required Values Missing');
            } else if(msg === 'duplicateEmail'){
                alert('Email already exist');
            } else {
                window.location = "index.php?users&option=edit&user_id="+msg+'&msg=success';
            }
        }
    });
});

$('form#save-user button[name="save-user-close"]').click(function() {
    var formData = 'option=saveuser&'+$('form#save-user').serialize();
    $.ajax({
        type: 'POST',
        url:  'process.php',
        data: formData,
        success: function(msg){
            if(msg === 'empty') {
                alert('Required Values Missing');
            } else if(msg === 'duplicateEmail'){
                alert('Email already exist');
            } else {
                window.location = 'index.php?users';
            }
        }
    });
});

$('form#save-user button[name="save-user-new"]').click(function() {
    var formData = 'option=saveuser&'+$('form#save-user').serialize();
    $.ajax({
        type: 'POST',
        url:  'process.php',
        data: formData,
        success: function(msg){
            if(msg === 'empty') {
                alert('Required Values Missing');
            } else if(msg === 'duplicateEmail'){
                alert('Email already exist');
            } else {
                window.location = 'index.php?users&option=create';
            }
        }
    });
});

我想知道一些事情，

a) With reference to above code, how do i convert it to function, as the code have very few changes like, selector name and url of window.location.

b) what do i call the code below, is it the function? function on the go? or dynamic function?

$('selector').event(function(){
     //jQuery Code in wake of event being triggered.
});

Answer 1

我会为它写一个小插件:

(function ($) {

jQuery.fn.myClick = function (destination) {
    this.click(function () { 
        var formData = 'option=saveuser&'+$('form#save-user').serialize();
        $.ajax({
            type: 'POST',
            url:  'process.php',
            data: formData,
            success: function(msg){
                if(msg === 'empty') {
                    alert('Required Values Missing');
                } else if(msg === 'duplicateEmail'){
                    alert('Email already exist');
                } else {
                    window.location = destination(msg);
                }
            }
        });
    });
}

}(jQuery));

然后调用它你只需要做:

$('form#save-user button[name="save-user-close"]').myClick(function() {
    return 'index.php?users&option=create';
});

和

$('form#save-user button[name="save-user"]').myClick(function (msg) {
    return "index.php?users&option=edit&user_id="+msg+'&msg=success';
});

你应该能够看到我们要去哪里；我们正在向我们创建的小方法添加参数，您可以在其中指定每次调用之间发生的变化。

因为在这种情况下，window.location 取决于 AJAX 响应(并且我们不知道调用该函数时的响应!)，我们不能简单地提供一个字符串 (或类似的东西)作为参数。相反，我们传递一个函数，一旦收到 AJAX 响应，我们就会调用该函数，前提是 msg 作为变量；并依靠该函数提供我们设置为 window.location 的字符串。

---

至于你的第二个问题，你传递了一个事件处理器给jQuery事件方法；事件处理程序将是一个函数引用(通常是对匿名函数的引用)