jquery - 如何将键“headerText”的值从 JSON 提取到结果 div

Question

给定我的 JSON 文件，当用户从 JSON 提供的下拉菜单中选择给定选项时，我想在结果 div 中显示 headerText 的值：

HTML

<div id="result"></div>
<select id="dropdown">
<option value="">Select</option>
</select>
<a href="#" id="fetch">Fetch JSON</a>

JSON

var json = {
"dropdown": [
{
    "optionText": "Budget Starter",
    "headerText": "Work 1-on-1 with your expert to build new spending habits (and break some old ones). Get on a real, sustainable budget that fits your lifestyle.",
    "color": "#59c5c7"
},
{
    "optionText": "5 Year Planner",
    "headerText": "Declare what you want - freedom from debt, security for your family, or an amazing trip. Your expert will build you a custom plan to help you get there.",
    "color": "#009cd0"
},
{
   "optionText": "Portfolio Builder",
    "headerText": "Start training for the world's hardest game: investing. Your expert will help you grow into a disciplined and balanced portfolio manager.",
    "color": "#39ad74"
}
]
};

jQuery

$('#fetch').click(function() {
$.post('/echo/json/', {json: JSON.stringify(json)}, function(data) {
    $.each(data.dropdown, function(i, v) {
        $('#dropdown').append('<option value="' + v.color + '">' + v.optionText + '</option>');
    });
});
});
//change color of header container based on dropdown selection
$("#dropdown").change(function() {
$("#result").css("background-color", $(this).val());
}).change();

CSS

#result{height: 50px;}

Answer 1

由于您使用的是 jQuery，因此您可能希望使用数据 API来实现它。它允许您在 DOM 元素旁边存储任意对象。

修改后的 jQuery（请参见此处的小提琴）

$('#fetch').click(function() {
$.post('/echo/json/', {json: JSON.stringify(json)}, function(data) {
    var dropdown = $('#dropdown');
    $.each(data.dropdown, function(i, v) {
        var option = $('<option value="' + v.color + '">' + v.optionText + '</option>');
        option.data('header', v.headerText).appendTo(dropdown);
    });
});
});
//change color of header container based on dropdown selection
$("#dropdown").change(function() {
$("#result").css("background-color", $(this).val()).text($(this).find('option:selected').data('header'));
}).change();