扩展Vue.js v-on:click指令 [英] Extend Vue.js v-on:click directive

问题描述

我是 vuejs 的问题.我正在尝试创建我的第一个应用程序.我想在每次单击按钮时显示一条确认消息.

I'm new to vuejs. I'm trying to create my first app. I would like to show a confirm message on every click on buttons.

示例:

<button class="btn btn-danger" v-on:click="reject(proposal)">reject</button>

我的问题是:我可以扩展v-on:click事件以在各处显示确认吗?我将创建名为v-confirm-click的自定义指令，该指令首先执行确认，然后如果我单击确定"，则执行click事件.有可能吗?

My question is: Can I extend the v-on:click event to show the confirm everywhere? I would make my custom directive called v-confirm-click that first executes a confirm and then, if I click on "ok", executes the click event. Is it possible?

推荐答案

我建议改用一个组件. Vue中的指令通常用于直接DOM操作.在大多数情况下，如果您认为需要使用指令，则使用组件会更好.

I would recommend a component instead. Directives in Vue are generally used for direct DOM manipulation. In most cases where you think you need a directive, a component is better.

这是确认按钮组件的示例.

Here is an example of a confirm button component.

Vue.component("confirm-button",{
  props:["onConfirm", "confirmText"],
  template:`<button @click="onClick"><slot></slot></button>`,
  methods:{
    onClick(){
      if (confirm(this.confirmText))
        this.onConfirm()
    }
  }

})

您可以这样使用:

<confirm-button :on-confirm="confirm" confirm-text="Are you sure?">
  Confirm
</confirm-button>

这里是一个例子.

console.clear()

Vue.component("confirm-button", {
  props: ["onConfirm", "confirmText"],
  template: `<button @click="onClick"><slot></slot></button>`,
  methods: {
    onClick() {
      if (confirm(this.confirmText))
        this.onConfirm()
    }
  }

})

new Vue({
  el: "#app",
  methods: {
    confirm() {
      alert("Confirmed!")
    }
  }
})

<script src="https://unpkg.com/vue@2.2.6/dist/vue.js"></script>
<div id="app">
  <confirm-button :on-confirm="confirm" confirm-text="Are you sure?">
    Confirm
  </confirm-button>
</div>

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