多个AJAX请求功能合为一体？

Question

我有几乎相同的Ajax Request调用，但我需要对其进行扩展以使其更加通用

参见示例代码：http :
//jsfiddle.net/2b8gR/6/

我让它适用于Page A，并且想将其用于Page B，C，D等…，但不想为每个新的Ajax请求重写该函数。

除以下内容外，大多数代码将保持不变：

• 输入下一个/上一个（page_a_next变为page_b_next）
• 显示页面div（display_page_a_page变为display_page_b_page）
• 显示页码div（display_page_a_number变为display_page_b_number）
• ajax请求url页面名称（URL：’page_a.php？page =’+ currentPageA，变为url：’page_b.php？page =’+ currentPageB，）

等等。

如何使Ajax调用和元素更通用，所以不必多次编写此请求？

注意：我需要能够跟踪当前显示的每个页面（A，B，C等）。是的，所有这些都在同一页面上

HTML：

<!-- Page A -->
<div>
    <span>Page A</span>
    <input id="page_a_next" name="page_a_next" type="button" value="Next" data-inline="true" />
    <input id="page_a_prev" name="page_a_prev" type="button" value="Previous" data-inline="true" /> 
</div>   
<div id="display_page_a_page" name="display_page_a_page">
</div>
<div id="display_page_a_number" name="display_page_a_number">
</div>

<!-- Page B -->
<div>
    <span>Page B</span>
    <input id="page_b_next" name="page_b_next" type="button" value="Next" data-inline="true" />
    <input id="page_b_prev" name="page_b_prev" type="button" value="Previous" data-inline="true" /> 
</div>   
<div id="display_page_b_page" name="display_page_b_page">
</div>
<div id="display_page_b_number" name="display_page_b_number">
</div>

JS：

var currentPageA=1;
var totalPageA=113;
loadPageA();

$("#page_a_next, #page_a_prev").click(function(){
    currentPageA = ($(this).attr('id')=='page_a_next') ? currentPageA + 1 : currentPageA - 1;

    if(currentPageA<=0) {
        currentPageA=1;                
        $('#page_a_prev').attr('disabled','disabled');
    } else if(currentPageA==114) {
        currentPageA=113;
        $('#page_a_next').attr('disabled','disabled');
    } else {
        loadPageA();
    }                
});

function loadPageA(){
    $('#page_a_next').attr('disabled','disabled');
    $('#page_a_prev').attr('disabled','disabled');

    $.ajax({
        url: 'page_a.php?page='+currentPageA,
        type: 'POST',
        error : function (){ alert('Error'); }, 
        success: function (data) {
            $('#display_page_a_number').html(currentPageA + ' of ' + totalPageA);
            $('#display_page_a_page').html(data);
            $('#page_a_next').attr('disabled','');
            $('#page_a_prev').attr('disabled','');
        }
    });
}

Answer 1

这里的关键不仅在于泛化您的JS，而且还泛化您的HTML。您还必须将currentPageA和totalPageA变量更改为array，以便它们可以容纳多个值。

观看我的演示： http :
//jsfiddle.net/Jaybles/b2uRd/

的HTML

<!-- Page A -->
<div>
    <span>Page A</span>
    <input class='pageButton' id="page_a_next" name="page_a_next" type="button" value="Next" data-inline="true"/>
    <input class='pageButton' id="page_a_prev" name="page_a_prev" type="button" value="Previous" data-inline="true" /> 
</div>   
<div id="display_page_a_page" name="display_page_a_page">
</div>
<div id="display_page_a_number" name="display_page_a_number">
</div>

<!-- Page B -->
<div>
    <span>Page B</span>
    <input class='pageButton' id="page_b_next" name="page_b_next" type="button" value="Next" data-inline="true" />
    <input class='pageButton' id="page_b_prev" name="page_b_prev" type="button" value="Previous" data-inline="true" /> 
</div>   
<div id="display_page_b_page" name="display_page_b_page">
</div>
<div id="display_page_b_number" name="display_page_b_number">
</div>

JS

var currentPage = {'a':1, 'b':1}; //Should go from A to Z
var totalPage = {'a':113, 'b':115}; //Should go from A to Z

$(".pageButton").click(function(){
    var a = $(this).attr('name').split("_");
    var page = a[1];
    var dir = a[2];
    currentPage[page]  = (dir=='next') ? currentPage[page] + 1 : currentPage[page] - 1;

    if(currentPage[page]<=0) {
        currentPage[page]=1;                
        $('#page_' + page + '_prev').attr('disabled','disabled');
    } else if(currentPage[page] > totalPage[page]) {
        currentPage[page]=totalPage[page];
        $('#page_' + page + '_next').attr('disabled','disabled');
    } else {
        loadPage(page);
    }                
});

loadPage('a');

function loadPage(page){
    $('#page_' + page + '_next').attr('disabled','disabled');
    $('#page_' + page + '_prev').attr('disabled','disabled');

    $.ajax({
        url: 'page_' + page + '.php?page='+currentPage[page],
        type: 'POST',
        error : function (){ document.title="error"; }, 
        success: function (data) {
            $('#display_page_' + page + '_number').html(currentPage[page]+ ' of ' + totalPage[page]);
            $('#display_page_' + page + '_page').html(data);
            $('#page_' + page + '_next').attr('disabled','');
            $('#page_' + page + '_prev').attr('disabled','');
        }
    });
}