如何在@click上更新模板

Question

代码

我有以下代码。我想用随机选择的选项更新results-box。如何在@click事件上更新模板。

<template>
  <div class="container">
    <button @click="getDecision()" class="ui primary button">Discover</button>
    <p id="results-box"></p>
  </div>
</template>

<script>
  export default {
    name: "SlapButton",
    data() {
      return {

      }
    },
    methods: {
      getDecision: function () {
        var decisions = [
          "choice 1",
          "choice 2",
          "choice 3",
          "choice 4",
          "choice 5",
          "choice 6"
        ]
        var randNum = Math.floor((Math.random() * decisions.length) + 0);
        var randChoice = decisions[randNum];
      }
    }
  }

</script>

问题

当用户点击按钮getDecision()时，它会从decisions数组中选择一个随机选项。如何在randChoice代码p中显示此随机选择#results-box。

Answer 1

尝试以下代码，请详细说明这是否有效：

<template>
  <div class="container">
    <button @click="getDecision" class="ui primary button">Discover</button>
    <p id="results-box">
      {{choice}}
    </p>
  </div>
</template>


<script>
  export default {
    name: "SlapButton",
    data() {
      return {
        choice: '',
        decisions = [
                  "choice 1",
                  "choice 2",
                  "choice 3",
                  "choice 4",
                  "choice 5",
                  "choice 6"
                ]
      }
    },
    methods: {
      getDecision() {
        var randNum = Math.floor((Math.random() * this.decisions.length) + 0);
        this.choice = this.decisions[randNum];
      }
    }
  }

</script>

Answer 2

这是demo ^{和another micro example}

基本上。一旦在randChoice对象中定义了这个变量，你就需要一个能保持data (){}的变量，只需在方法中给它一个值，如下所示：

export default {
  name: "SlapButton",
  data() {
    return {
      randomChoice: false
    }
  },
  methods: {
    getDecision: function () {
      var decisions = [
        "choice 1",
        "choice 2",
        "choice 3",
        "choice 4",
        "choice 5",
        "choice 6"
      ]
      var randNum = Math.floor((Math.random() * decisions.length) + 0);
      this.randomChoice = decisions[randNum];
    }
  }
}

现在只需在您的元素中显示此数据：

<p id="results-box"> {{randomChoice}} </p>