在按钮单击时切换 vue-multiselect 关闭/打开

Question

When I click on the button, multiselect opens. But when I click on the button a second time, the true / false values ​​flash and as a result, isOpen remains true. What am I doing wrong?

template:

<div id="app">
  <button @click="toggle">open and close later
  </button>
    <pre>{{ isOpen }}</pre>
  <multiselect 
    ref="multiselect"
    v-model="value" 
    :options="options"
    :multiple="true"
    track-by="library"
    :custom-label="customLabel"
    @close="isOpen = false"
    @open="isOpen = true"
    >
  </multiselect>
</div>

js:

new Vue({
    components: {
    Multiselect: window.VueMultiselect.default
    },
    data: {
    isOpen: false,
    value: { language: 'JavaScript', library: 'Vue-Multiselect' },
    options: [
        {   language: 'JavaScript', library: 'Vue.js' },
      { language: 'JavaScript', library: 'Vue-Multiselect' },
      { language: 'JavaScript', library: 'Vuelidate' }
    ]
    },
  methods: {
    toggle () {
        if (this.isOpen) {
        this.$refs.multiselect.$el.blur();
        this.isOpen = false;
      }
      else {
        this.$refs.multiselect.$el.focus();
        this.isOpen = true;
      }

    }
  }
}).$mount('#app')

https://jsfiddle.net/46s5aknt/

Answer 1

As I dug the source code of this component, unfortunately, I realized there is not any "legit" way to make works your requirement. @blur callback will be called no matter what. There is no way to regulate this behavior.

Workaround: some aspect of locking with a cooldown time...

new Vue({
  components: {
    Multiselect: window.VueMultiselect.default
  },
  data: {
  blocked: false,
  value: { language: 'JavaScript', library: 'Vue-Multiselect' },
  options: [
    { language: 'JavaScript', library: 'Vue.js' },
    { language: 'JavaScript', library: 'Vue-Multiselect' },
    { language: 'JavaScript', library: 'Vuelidate' }
  ]
},
  methods: {
    toggle () {
      if (!this.blocked) {
        this.$refs.multiselect.toggle();
      }
    },
    block () {
      this.blocked = true;
      setTimeout(() => {
        this.blocked = false;
      }, 200);
    }
  }
}).$mount('#app')

Answer 2

The problem here is that VueMultiselect closes when there is a click outside the component.

So when you press the click button (on your mouse) VueMultiselect closes and when you release the click button you are actually reopening VueMultiselect since isOpen was set to false in the close event.

So your button can only be an Open button.

Edit:

The best solution would be to hide the button when the VueMultiselect is open.