My attempt at using a basic jquery change listener on a materialize css select dropdown has been unsuccessful.
$("#somedropdown").change(function() {
alert("Element Changed");
});
1) Can anyone provide guidance on how to add a listener to detect changes in a materialize select element?
2) Furthermore, what is the best approach to retrieve the selected value in this scenario?
Include an identifier for selection
<select id="select1">
<optgroup label="team 1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
</optgroup>
<optgroup label="team 2">
<option value="3">Option 3</option>
<option value="4">Option 4</option>
</optgroup>
</select>
Attach an event listener using jquery and the specified id
$("#select1").on('change', function() {
console.log($(this));
});
Hopefully, this explanation is helpful :-)
Setting up event listeners can sometimes be tricky, but I experimented with a simple example on codepen. You can view it here: http://codepen.io/anon/pen/yXBBYY.
By placing the event listener directly on the <select> element itself, you should have no problem detecting changes.
When using materialize, it's important to note that it adds its own data-select-id. Any ID you add to the select element may cause instability. One solution is to wrap your select element with a div and give it an ID. Then, use jQuery to select that ID and chain the select element like this:
<div id="select1">
<select >
<optgroup label="team 1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
</optgroup>
<optgroup label="team 2">
<option value="3">Option 3</option>
<option value="4">Option 4</option>
</optgroup>
</select>
</div>
Then, add the following code:
$('#select1 select').on('change', function(){
console.log("option selected!")
// do your stuff here.
})
This method has worked for me in the past.
Utilizing materialize-css along with angular7, here is the method I have implemented:
<div class="input-field col s12">
<select #qwcSelect (change)="optionChanged($event)">
<option value="" selected disabled>{{placeHolder}}</option>
// options
</select>
<label>{{label}}</label>
</div>
Within my component:
optionChanged(event) {
console.log(`Selected Value ${event.target.value}`);
}
Regrettably, materialize.css converts a <select> into a simulated select with a <ul> and multiple <li> elements. While you can attempt to attach events to the created <li> items, it appears challenging: you cannot easily bind an onchange event to a materialize.css <select> without using the browser-default class or doing some extra searching.
Ensure to attach a change event listener during the initialization of a material select dropdown.
$(document).ready(function(){
$('#somedropdown').material_select(someScope.someEvent.bind(someScope));
});
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