css - 如何在 Bootstrap vue 上制作按钮减号和加号？

Question

我从这里得到教程:https://bootstrap-vue.js.org/docs/components/form-input

我想做这样的:

我尝试这样:

<template>
    ...
        <b-col class="pr-0 custom-control-inline">
            <b-btn variant="warning btn-sm mr-1 mt-1 mb-1"><i class="fa fa-minus-circle"></i></b-btn>
            <b-form-input type="number" class="col-md-3" v-model="quantity"></b-form-input>
            <b-btn variant="info btn-sm ml-1 mt-1 mb-1"><i class="fa fa-plus-circle"></i></b-btn>
        </b-col>
    ...
</template>
<script>
    export default {
        data () {
            return {
                quantity: null
            }
        }
    }
</script>

结果如下:

如何让按钮加减号起作用？

所以如果点击按钮加号，数量会增加

Answer 1

来自 docs :

<b-input-group>
  <b-input-group-prepend>
    <b-btn variant="outline-info">-</b-btn>
  </b-input-group-prepend>

  <b-form-input type="number" min="0.00"></b-form-input>

  <b-input-group-append>
    <b-btn variant="outline-secondary">+</b-btn>
  </b-input-group-append>
</b-input-group>

只需设置您喜欢的按钮样式，并将 click 事件添加到按钮以用于 输入数字 逻辑，例如:

new Vue({
  el: '#app',
  data: {
    num: 0
  }
})

<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap/dist/css/bootstrap.min.css" />
<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.css" />

<!-- Add this after vue.js -->
<script src="https://unpkg.com/vue"></script>
<script src="//unpkg.com/babel-polyfill@latest/dist/polyfill.min.js"></script>
<script src="//unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js"></script>

<div id="app">
  <b-input-group>
    <b-input-group-prepend>
      <b-btn variant="outline-info" @click="num--">-</b-btn>
    </b-input-group-prepend>

    <b-form-input type="number" min="0.00" v-model="num"></b-form-input>

    <b-input-group-append>
      <b-btn variant="outline-secondary" @click="num++">+</b-btn>
    </b-input-group-append>
  </b-input-group>
</div>