[英]Populate select drop-down using object (JavaScript or jQuery)
I'm trying to populate the options of a select drop-down using jQuery, and I've been partially successful, except for one of extra that I would like to add to it. 我正在尝试使用jQuery填充选择下拉列表的选项,除了获得我想要添加的其他功能之一之外,我已经取得了部分成功。
This is the object: 这是对象:
var test =[
{
"Issue":[
"A producers",
"A producers",
"H producers",
"I producers",
"Limited resource producers",
"Organic producers",
"Producers MM",
"Producers MM"
],
"Activity Type":[
"Career Fairs",
"Career Fairs",
"Outreach",
"Targeted States Programs",
"Partnership Programs",
"Education",
"Career Fairs",
"Targeted States Programs"
],
"Minority Serving Institute":[
"A",
"DD",
"B",
"HSI",
"DD",
"A",
"HSI",
"B"
],
"Leading Office":[
"DAIS",
"RMED",
"RMSD",
"RMSD",
"DAIS",
"RMSD",
"RMED",
"RMED"
],
"Location":[
"AAAAA",
"TEST",
"DFDFFF",
"MIAMI",
"45tw45t ",
"EEEEEEE",
"NEW ORLEANS",
"RTRTRTR"
],
"State":[
"Alaska",
"Alaska",
"Arizona",
"Florida",
"Alaska",
"Kentucky",
"Louisiana",
"Iowa"
]
}
];
To populate the options I use: 要填充我使用的选项:
var prev;
for (var key in test) {
var obj = test[key];
for (var w in obj) {
var obj2 = obj[w];
for (var z in obj2) {
var obj3 = obj2[z];
if (prev != obj3) {
prev = obj3;
$('.filter').append($("<option />").val(obj3).text(obj3));
}
}
}}
This is my question: How can I add to my drop down options groups adding "Issues", "Activity Type"... etc.,and under each option group its respective properties? 这是我的问题:如何在下拉选项组中添加“问题”,“活动类型” ...等,并在每个选项组下分别添加各自的属性?
Thanks in advance. 提前致谢。
Just use w
(eg 'Issues') to add a <optgroup>
element and use that label to add the options to the correct group. 只需使用
w
(例如“问题”)添加<optgroup>
元素,然后使用该标签将选项添加到正确的组即可。
var test = [{ "Issue": ["A producers", "A producers", "H producers", "I producers", "Limited resource producers", "Organic producers", "Producers MM", "Producers MM"], "Activity Type": ["Career Fairs", "Career Fairs", "Outreach", "Targeted States Programs", "Partnership Programs", "Education", "Career Fairs", "Targeted States Programs"], "Minority Serving Institute": ["A", "DD", "B", "HSI","DD", "A", "HSI", "B"], "Leading Office": ["DAIS", "RMED", "RMSD", "RMSD", "DAIS", "RMSD", "RMED", "RMED"], "Location": ["AAAAA", "TEST", "DFDFFF", "MIAMI", "45tw45t ", "EEEEEEE", "NEW ORLEANS", "RTRTRTR"], "State": ["Alaska", "Alaska", "Arizona", "Florida", "Alaska", "Kentucky", "Louisiana", "Iowa"] }]; for (var key in test) { var obj = test[key]; for (var w in obj) { var obj2 = obj[w]; $('.filter').append($("<optgroup />").attr({'label': w})); for (var z in [...new Set(obj2)]) { var obj3 = obj2[z]; $('.filter optgroup[label="'+w+'"]').append($("<option />").val(obj3).text(obj3)); } } }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <select class="filter"></select>
You can use the optgroup
tag. 您可以使用
optgroup
标签。
const filterElement = $('.filter')[0]; // just for me to get the DOM element
test.forEach(function(list) { // loop through the array
for (let key in list) {
let optGroup = document.createElement('optgroup');
optGroup.setAttribute('label', key); // set the label so that it displays properly
list[key].forEach(function(value) {
let option = document.createElement('option');
option.textContent = value;
optGroup.appendChild(option); // add option to group
});
filterElement.appendChild(optGroup); // add group to select box
}
});
Working fiddle: https://jsfiddle.net/2gfhv4w8/10/ 工作提琴: https : //jsfiddle.net/2gfhv4w8/10/
var test = [{ "Issue": ["A producers", "A producers", "H producers", "I producers", "Limited resource producers", "Organic producers", "Producers MM", "Producers MM"], "Activity Type": ["Career Fairs", "Career Fairs", "Outreach", "Targeted States Programs", "Partnership Programs", "Education", "Career Fairs", "Targeted States Programs"], "Minority Serving Institute": ["A", "DD", "B", "HSI", "DD", "A", "HSI", "B"], "Leading Office": ["DAIS", "RMED", "RMSD", "RMSD", "DAIS", "RMSD", "RMED", "RMED"], "Location": ["AAAAA", "TEST", "DFDFFF", "MIAMI", "45tw45t ", "EEEEEEE", "NEW ORLEANS", "RTRTRTR"], "State": ["Alaska", "Alaska", "Arizona", "Florida", "Alaska", "Kentucky", "Louisiana", "Iowa"] }]; const filterElement = document.getElementById('filter'); test.forEach(function(list) { for (let key in list) { let optGroup = document.createElement('optgroup'); optGroup.setAttribute('label', key); list[key].forEach(function(value) { let option = document.createElement('option'); option.textContent = value; optGroup.appendChild(option); // add option to group }); filterElement.appendChild(optGroup); // add group to select box } });
<select id="filter"></select>
var test = [{ "Issue": ["A producers", "A producers", "H producers", "I producers", "Limited resource producers", "Organic producers", "Producers MM", "Producers MM"], "Activity Type": ["Career Fairs", "Career Fairs", "Outreach", "Targeted States Programs", "Partnership Programs", "Education", "Career Fairs", "Targeted States Programs"], "Minority Serving Institute": ["A", "DD", "B", "HSI","DD", "A", "HSI", "B"], "Leading Office": ["DAIS", "RMED", "RMSD", "RMSD", "DAIS", "RMSD", "RMED", "RMED"], "Location": ["AAAAA", "TEST", "DFDFFF", "MIAMI", "45tw45t ", "EEEEEEE", "NEW ORLEANS", "RTRTRTR"], "State": ["Alaska", "Alaska", "Arizona", "Florida", "Alaska", "Kentucky", "Louisiana", "Iowa"] }]; var prev; cat = ''; result = ''; for (var key in test) { var obj = test[key]; for (var w in obj) { var obj2 = obj[w]; if (!cat) { result+='<optgroup label="' + w +'">'; cat = w; } if ( cat != w) { result+='</optgroup><optgroup label="' + w +'">'; cat = w; } for (var z in obj2) { var obj3 = obj2[z]; if (prev != obj3) { prev = obj3; result+='<option value="'+obj3+'">'+obj3+'</option>'; } } } } result+='</optgroup>'; $('.filter').append(result);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script> <select class="filter"> </select>
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