😌Dependent Dropdown Full (ok)
PreviousFlatten an array of arrays,merge, làm phẳng một mảng các mảng (ok)NextSelect Box Change Dependent Options dynamically (JavaScript Object)
Last updated
Was this helpful?
Last updated
Was this helpful?
C:\xampp8\htdocs\lva\index.php
<!DOCTYPE html>
<html>
<head>
<meta charset='UTF-8' />
<!--<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>-->
<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function() {
//create arrays to store option and values
var continents = [{
display: "Asia",
value: "asia"
},
{
display: "Africa",
value: "africa"
},
{
display: "Antarctica",
value: "antarctica"
},
{
display: "Australia",
value: "australia"
},
{
display: "Europe",
value: "europe"
},
{
display: "North America",
value: "north-america"
},
{
display: "South America",
value: "south-america"
}
];
var oceans = [{
display: "Pacific",
value: "pacific"
},
{
display: "Atlantic",
value: "atlantic"
},
{
display: "Indian",
value: "indian"
},
{
display: "Southern",
value: "southern"
},
{
display: "Arctic",
value: "arctic"
}
];
//If parent option is changed
$("#parent_selection").change(function() {
var parent = $(this).val(); //get option value from parent
switch (parent) { //using switch compare selected option and populate child
case 'continents':
$('#child_selection').attr('disabled', false);
list(continents);
break;
case 'oceans':
$('#child_selection').attr('disabled', false);
list(oceans);
break;
default: //default child option is blank
$("#child_selection").html('');
$('#child_selection').attr("disabled", true);
break;
}
});
//function to populate child select box
function list(array_list) {
$("#child_selection").html(""); //reset child options
$(array_list).each(function(i) { //populate child options
$("#child_selection").append("<option value='" + array_list[i].value + "'>" + array_list[i].display + "</option>");
});
}
});
</script>
</head>
<body>
<div class="wrapper">
Select :
<select name="parent_selection" id="parent_selection">
<option value="">-- Please Select --</option>
<option value="continents">Continents</option>
<option value="oceans">Oceans</option>
</select>
<select name="child_selection" id="child_selection" disabled="disabled" />
</div>
</body>
</html>
C:\xampp8\htdocs\lva\index.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Dependable list with jQuery</title>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous" />
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.0/jquery.min.js"></script>
</head>
<body>
<div class="container mt-5">
<form>
<!-- Super Parent -->
<div class="form-group">
<label for="first_list"> User select </label>
<select class="form-control" id="first_list">
<option value="0"> Select User list </option>
<option value="1"> User A </option>
<option value="2"> User B </option>
<option selected value="3"> User C </option>
<option value="4"> User D </option>
<option value="5"> User E </option>
</select>
</div>
<!-- Parent: User list and Child: Subject list -->
<div class="form-group">
<label for="second_list"> Subject select </label>
<select class="form-control" id="second_list">
<option data-list-id="0" value="0"> Select subject list </option>
<option data-list-id="1" value="1"> Subject A.1 </option>
<option data-list-id="1" value="2"> Subject A.2 </option>
<option data-list-id="1" value="3"> Subject A.3 </option>
<option data-list-id="2" value="4"> Subject B </option>
<option data-list-id="3" selected value="5"> Subject C </option>
<option data-list-id="4" value="6"> Subject D </option>
<option data-list-id="5" value="7"> Subject E </option>
</select>
</div>
<!-- Parent: Subject list and Child: Topic list -->
<div class="form-group">
<label for="third_list">Topic select</label>
<select class="form-control" id="third_list">
<option data-list-id="0" value="0"> Select Topic list </option>
<option data-list-id="1" value="1"> Topic A.1.1 </option>
<option data-list-id="1" value="2"> Topic A.1.2 </option>
<option data-list-id="1" value="3"> Topic A.1.3 </option>
<option data-list-id="2" value="4"> Topic A.2.1 </option>
<option data-list-id="3" selected value="5"> Topic A.3.1 </option>
<option data-list-id="4" value="6"> Topic B </option>
<option data-list-id="5" value="7"> Topic C </option>
<option data-list-id="6" value="8"> Topic D </option>
<option data-list-id="7" value="9"> Topic E </option>
</select>
</div>
<!-- Parent: Subject list and Child: Question list -->
<div class="form-group">
<label for="fourth_list">Question select</label>
<select class="form-control" id="fourth_list">
<option data-list-id="0" value="0"> Select Question list </option>
<option data-list-id="1" value="1"> Question A.1.1 </option>
<option data-list-id="1" value="2"> Question A.1.2 </option>
<option data-list-id="1" value="3"> Question A.1.3 </option>
<option data-list-id="2" value="4"> Question A.2.1 </option>
<option data-list-id="3" selected value="5"> Question A.3.1 </option>
<option data-list-id="4" value="6"> Question B </option>
<option data-list-id="5" value="7"> Question C </option>
<option data-list-id="6" value="8"> Question D </option>
<option data-list-id="7" value="9"> Question E </option>
</select>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
<script src="dependableList.js"></script>
<script type="text/javascript">
createDependableList('#first_list', '#second_list');
createDependableList('#second_list', '#third_list');
createDependableList('#second_list', '#fourth_list');
</script>
</body>
</html>
C:\xampp8\htdocs\lva\dependableList.js
/**
* Create dependable list with this function
* @param {*} parentList-id
* @param {*} childList-id
*/
function createDependableList(parentList, childList) {
var options = $(childList + ' option');
$(parentList).change(function () {
$(childList).empty();
options.each((index, option) => {
if ($(option).data('list-id') == this.value /* || $(option).data('list-id') == 0 */) {
option.selected = option.selected ? true : false;
$(childList).append(option);
}
$(childList).trigger('change');
})
if ($(childList + ' option').length === 0) {
$(childList).append('<option value="">No option available..</option>');
}
})
}
