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added Multiple dropdown value feature #55

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added Multiple dropdown value feature #55

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28 changes: 28 additions & 0 deletions views/dropdown.erb
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,21 @@
<option value="2">Option 2</option>
</select>
</div>

<div class="example">
<h3>Multiple value Dropdown List</h3>
<select id="dropdown1" multiple="true">
<option value="" disabled="disabled" selected="selected"
>Please select an option</option
>
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 3</option>
<option value="4">Option 4</option>
</select>
</div>


<script>
var dropdown = document.getElementById('dropdown');
dropdown.onchange = function(event) {
Expand All @@ -20,3 +35,16 @@
.setAttribute('selected', 'selected');
};
</script>

<script>
var dropdown = document.getElementById('dropdown1');
dropdown.onchange = function(event) {
var options = dropdown.getElementsByTagName('option');
for (var i = 0; i < options.length; i++) {
options[i].removeAttribute('selected');
}
document
.querySelector(`#dropdown1 option[value='${event.target.value}']`)
.setAttribute('selected', 'selected');
};
</script>