Question

我有一个键值列表，其中键是一个人类可读的名称，值应该适合链接，例如：

[ 
 {"name": "The home page",        "value": "/index.php"}, 
 {"name": "The Pictures Section", "value": "/pics/index.html"},
 ...
]

链接的键值列表，例如：

[ 
 {"name" : "My Site",  "value:":"homesite.com/my_site"},
 {"name" : "His Site", "value:":"homesite.com/his_site"},
 {"name" : "Her Site", "value:":"homesite.com/her_site"}, 
 ...
]

我想有一个带有下拉菜单的网页和一个链接列表。用户将选择一个名称，并相应地附加链接列表。例如，如果用户选择了The Pictures Section，则会显示以下列表：

<a href="homesite.com/my_site/pics/index.html">  My Site   </a>  <br>
<a href="homesite.com/his_site/pics/index.html"> His Site  </a>  <br>
<a href="homesite.com/her_site/pics/index.html"> Her Site  </a>  <br>

我该如何解决这个问题？

Answer 1

var arraya = [ 
 {"name": "The home page",        "value": "/index.php"}, 
 {"name": "The Pictures Section", "value": "/pics/index.html"},
 ...
]

var arrayb = [ 
 {"name" : "My Site",  "value:":"homesite.com/my_site"},
 {"name" : "His Site", "value:":"homesite.com/his_site"},
 {"name" : "Her Site", "value:":"homesite.com/her_site"}, 
 ...
]

//bind a click event to your a tags
$('a').click(function() {
//get the url of the tag
var url = $(this).attr('href');

loop through arrayb until you match the one you want
var site;
for (site in arrayb)
{
if (site.value == url)
{
break;
}
}
});

//loop through arraya matching on the name of the value matched above
var value;
for(value in arraya)
{
if (site.name == value.name)
{
break;
}
}

//this is your value
site.value;

});

Answer 2

以下代码未经过测试，我只是编写它为您提供了一个起点。我希望这就是你要找的东西：

var sections = [ 
        {"name": "The home page",        "value": "/index.php"}, 
        {"name": "The Pictures Section", "value": "/pics/index.html"},
        ...
    ],
    urls = [ 
        {"name" : "My Site",  "value:":"homesite.com/my_site"},
        {"name" : "His Site", "value:":"homesite.com/his_site"},
        {"name" : "Her Site", "value:":"homesite.com/her_site"}, 
        ...
    ];

function generateSelectHtml() {
    var html = '<select id="sections" onchange="showSescion(this);">';
    for (var i = 0; i < sections.length; i++) {
        html += '<option value="' + sections[i].value + '">' + sections[i].name + '</option>';
    }
    html += "</select>";
    return html;
}

function generateSelectDom() {
    var el = document.createElement("SELECT");
    el.id = "sections";
    el.onchange = function() { showSection(el); };

    for (var i = 0; i < sections.length; i++) {
        var option = document.createElement("option");
        option.value = sections[i].value;
        option.innerText = sections[i].name;
        el.appendChild(option)
    }

    return el;
}

function showSection(box) {
    var container = document.getElementById("listContainer");
    for (var i = 0; i < urls.length; i++) {
        var item = document.getElementById("a");
        item.href = urls[i].value + box.value;
        item.innerText = urls[i].name;
        container.appendChild(item);
    }
}

你当然会有很多改变。我做的是： generateSelectHtml 方法返回选择框的html，你可以将它添加到dom中：

document.getElementById("AN_ID").innerHTML = generateSelectHtml();

generateSelectDom 方法创建实际的dom元素，因此您只需使用 appendChild 将其添加到现有的dom中。

showSection 方法只将选定的值输出到id listContainer 的元素中。

JavaScript：根据下拉菜单更改链接值

2 个答案: