问题
Trying to use jquery-chosen with vue, the problem is that this plugin hides the actual select that I applied v-model, so when I select a value vue doesn't recognize it as a select change event and model value is not updated.
The value of the select is being changed actually when I select something, I've inspected this with console.log to see the selected value.
http://jsfiddle.net/qfy6s9Lj/3/
I could do vm.$data.city = $('.cs-select').val(), that seems to work,
But is there another option? If the value of the select was changed why vue doesn't see this?
回答1:
Answer: http://jsfiddle.net/qfy6s9Lj/5/
<div id='search-results'>
Vue model value <br>
{{city}}
<hr>
Select value:
<select class="cs-select" v-chosen>
<option value="Toronto">Toronto</option>
<option value="Orleans">Orleans</option>
</select>
</div>
Vue.directive('chosen', {
bind: function () {
var vm = this.vm;
this.el.options = vm.cities;
this.el.value = vm.city;
$(this.el).chosen({
inherit_select_classes: true,
width: '30%',
disable_search_threshold: 999})
.change( function() {
vm.city = this.el.value;
}.bind(this)
);
}
});
var vm = new Vue({
data: {
city: 'Toronto',
cities: ['Toronto', 'Orleans']
}
}).$mount("#search-results");
UPDATE: an even better solution (thanks to simplesmiler): http://jsfiddle.net/simplesmiler/qfy6s9Lj/8/
回答2:
@swift's answer got pretty close, but as @bertrand pointed out, it doesn't work for multiselects. I've worked something out that works with both cases: http://jsfiddle.net/seanwash/sz8s99xx/
I would have just commented but I don't have enough rep to do so.
Vue.directive('chosen', {
twoWay: true, // note the two-way binding
bind: function () {
$(this.el)
.chosen({
inherit_select_classes: true,
width: '30%',
disable_search_threshold: 999
})
.change(function(ev) {
// two-way set
// Construct array of selected options
var i, len, option, ref;
var values = [];
ref = this.el.selectedOptions;
for (i = 0, len = ref.length; i < len; i++) {
option = ref[i];
values.push(option.value)
}
this.set(values);
}.bind(this));
},
update: function(nv, ov) {
// note that we have to notify chosen about update
$(this.el).trigger("chosen:updated");
}
});
var vm = new Vue({
data: {
city: 'Toronto',
cities: [{text: 'Toronto', value: 'Toronto'},
{text: 'Orleans', value: 'Orleans'}]
}
}).$mount("#search-results");回答3:
I am opened for other suggestions, but for the time-being I did it this way:
html
<div id='search-results'>
{{city}}
<select class="cs-select" v-model='city'>
<option value="Toronto">Toronto</option>
<option value="Orleans">Orleans</option>
</select>
</div>
js
window.vm = new Vue({
el: '#search-results',
data: {
city: 'Toronto',
}
})
$('.cs-select').chosen({
inherit_select_classes: true,
width: '30%'
}).change( function() {
vm.$data.city = $('.cs-select').val()
})
回答4:
Update: Be advised this doesn't work from within a v-for loop. A related question that deals with that is available here.
Going off of @kaktuspalme's solution, and with help from my friend Joe Fleming, I came up with a solution that works with Vue 2 and allows single and multiple selections:
Vue.directive('chosen', {
inserted: function(el, binding, vnode) {
jQuery(el).chosen().change(function(event, change) {
if (Array.isArray(binding.value)) {
var selected = binding.value;
if (change.hasOwnProperty('selected')) {
selected.push(change.selected);
} else {
selected.splice(selected.indexOf(change.deselected), 1);
}
} else {
var keys = binding.expression.split('.');
var pointer = vnode.context;
while (keys.length > 1)
pointer = pointer[keys.shift()];
pointer[keys[0]] = change.selected;
}
});
},
componentUpdated: function(el, binding) {
jQuery(el).trigger("chosen:updated");
}
});
Use it like this:
<select v-model="mymodel" v-chosen="mymodel">...</select>
It works with multiple="multiple" and even with nested state, e.g.:
<select v-model="nested.mymodel" v-chosen="nested.mymodel">...</select>
See the fiddle here: https://jsfiddle.net/tylercollier/bvvvgyp0/5/
回答5:
I made an update for vue2.
Vue.directive('chosen', {
selected: null,
inserted: function (el, binding) {
selected = binding.value;
$(el).chosen().change(function(event, change) {
if(change.hasOwnProperty('selected')) {
selected.push(change.selected);
} else {
selected.splice(selected.indexOf(change.deselected), 1);
}
});
},
componentUpdated: function(el, binding) {
selected = binding.value;
$(el).trigger("chosen:updated");
}
});
var vm = new Vue({
el: '#app',
data: {
selected: [],
cities: [{id: 1, value: "Toronto"}, {id: 2, value: "Orleans"}, {id: 3, value: "Bern"}]
}
});
See: https://jsfiddle.net/kaktuspalme/zenksm2b/
回答6:
Code taken from @kaktuspalme answer. It works with non-multiple elements now and only for non-multiple.
Vue.directive('chosensingle', {
inserted: function (el, binding) {
var selected = binding.value;
$(el).chosen().change(function(event, change) {
if(change.hasOwnProperty('selected')) {
selected.value = change.selected;
} else {
selected.value ='';
}
});
},
componentUpdated: function(el, binding) {
$(el).trigger("chosen:updated");
}
});
Comments from @Tyler Collier are taken into account
But be carefully,property you use in v-model should be defined as array , e.g. applicantId: [] otherwise it doesn't work
来源：https://stackoverflow.com/questions/31315702/update-vuejs-model-value-using-jquery-chosen-plugin