Select2 on change event is not working in Vuejs
By assigning select2 value to vuejs data I am able to fix this problem. I didn't use custom directive here.
var app = new Vue({
el: '#app',
data: {
supplier_id: "niklesh"
},
filters: {
capitalize: function (value) {
if (!value) return ''
value = value.toString()
return value.charAt(0).toUpperCase() + value.slice(1)
}
}
});
$('#supplier_id').on("change",function(){
app.supplier_id = $(this).val();
console.log('Name : '+$(this).val());
});
$('#supplier_id').select2({});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.4/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.5/css/bootstrap.css">
<div id="app">
Name : {{ supplier_id | capitalize }}
<select id="supplier_id" class='form-control' v-model='supplier_id'>
<option value="atul">Atul</option>
<option value="niklesh">Niklesh</option>
<option value="sachin">Sachin</option>
</select>
</div>Please comment if this is not good way or any better solution you suggest.
To get this to work with a directive, we need to understand how v-model works. From the docs:
<input v-model="something">is just syntactic sugar for:
<input v-bind:value="something" v-on:input="something = $event.target.value">
In the case of a select element, v-model will listen for the change event (not input). So, if the directive dispatches a change event when the element changes, then v-model will work as expected.
Here is an updated version of your code (works in Vue 2):
Vue.directive('select', {
twoWay: true,
bind: function (el, binding, vnode) {
$(el).select2().on("select2:select", (e) => {
// v-model looks for
// - an event named "change"
// - a value with property path "$event.target.value"
el.dispatchEvent(new Event('change', { target: e.target }));
});
},
componentUpdated: function(el, me) {
// update the selection if the value is changed externally
$(el).trigger("change");
}
});
var app = new Vue({
el: '#app',
data: {
supplier_id: "niklesh"
},
})
$('#supplier_id').select2({});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.4/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.5/css/bootstrap.css">
<div id="app">
{{ supplier_id }}
<select id="supplier_id" class='form-control' v-model='supplier_id' v-select='supplier_id'>
<option value="atul">Atul</option>
<option value="niklesh">Niklesh</option>
<option value="sachin">Sachin</option>
</select>
</div>And here's a version that works in Vue 3 (custom directives have different syntax, linked here):
var app = Vue.createApp({
data: function() {
return {
supplier_id: "niklesh"
}
}
})
app.directive('select', {
beforeMount: function (el, binding, vnode) {
$(el).select2().on("select2:select", (e) => {
// v-model looks for
// - an event named "change"
// - a value with property path "$event.target.value"
el.dispatchEvent(new Event('change', { target: e.target }));
});
},
updated: function(el) {
// update the selection if the value is changed externally
$(el).trigger("change");
}
});
app.mount('#app');
$('#supplier_id').select2({});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js"></script>
<script src="https://unpkg.com/[email protected]"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.5/css/bootstrap.css">
<div id="app">
{{ supplier_id }}
<select id="supplier_id" class='form-control' v-model='supplier_id' v-select='supplier_id'>
<option value="atul">Atul</option>
<option value="niklesh">Niklesh</option>
<option value="sachin">Sachin</option>
</select>
</div>