与vue.js一起使用Select2(多选)

this.value 当Select2处于多值模式时,无法按预期工作(更多信息请点击此处: Get Selected value from Multi-Value Select Boxes by jquery-select2? ).

试试这个(这里的工作小提琴: https://jsfiddle.net/02rafh8p/ ):

Vue.directive('select', {
    twoWay: true,
    priority: 1000,

    params: ['options'],

    bind: function() {
        var self = this
        $(this.el)
                .select2({
                    data: this.params.options
                })
                .on('change', function() {
                    self.set($(self.el).val()) // Don't use this.value
                })
    },
    update: function(value) {
        $(this.el).val(value).trigger('change')
    },
    unbind: function() {
        $(this.el).off().select2('destroy')
    }
})

var vm = new Vue({
    el: '#el',
    data: {
        selected: [], // Result is an array of values.

        roles : [
            { id: 1, text: 'hello' },
            { id: 2, text: 'what' }
        ]
    }
})

在Vue 2中,要在更改后获取所有select2值:

更改此设置:

.on('change', function () {
  self.$emit('input', this.value); // Don't use this.value
});

为此:

.on('change', function () {
  self.$emit('input', $(this).val());
});