基于vue的modal实现（仿monday.com的modal）

写modal要有一个父组件，一个子组件。父组件中点击打开modal，子组件中关闭nodal. 这里通过v-if来实现modal的打开和关闭。

父组件 mondayModal.vue

<template>
  <div class="mondayModal">
    <h4>{{txt}}</h4>
    <h3 @click='isShow = true'>点击打开dialog</h3>
    <mondayDialog v-if='isShow' :show='isShow' @change='changeShow'/>
  </div>
</template>
<script>
import mondayDialog from './mondayDialog.vue'
export default {
  name: "mondayModal",
  data: () => ({
    txt: '仿monday的modal',
    isShow: false
  }),
  components: {
    mondayDialog
  },
  methods: {
    changeShow(val) {
      this.isShow = val
    }
  }
}
</script>
<style lang='scss' scoped>
//清除默认样式的css
@import '../style/reset.css';

.mondayLmitation{
  width: 100%;
  height: 100%;
   h4{
      text-align: center;
   }
   h3{
     cursor: pointer;
   }
 }
</style>

子组件mondayDialog.vue

<template>
<transition name='slide-fade'>
  <div class="mondayDialog">
    <div class="modal-background"></div>
    <div class="content">
      <div class="close-dialog">
        <a @click='closeDia'>+</a>
      </div>
       <h3>{{txt}}</h3>
       <p>2014年加入monday.com</p>
       <p>有大概30000多人加入monday.com</p>
       <div class="buttonBox">
          <input type="text" name="" value="" placeholder='Enter your work email'>
          <div class="sendButton">
             <button type="button" name="button">Create Free Account</button>
          </div>
       </div>
    </div>
  </div>
</transition>
</template>
<script>
export default {
  name: "mondayDialog",
  data: () => ({
    a: 1,
    txt: 'I want to hug the people that created this.',
    opendialog: true
  }),
  props: ['show'],
  methods: {
    closeDia () {
      this.show = this.opendialog
      this.opendialog  = false
      this.$emit('change',this.opendialog)
    }
  }
}
</script>
<style lang="scss" scoped>
@import '../style/reset.css';
.slide-fade-enter-active {
  transition: all .3s ease;
}
.slide-fade-leave-active {
  transition: all .3s cubic-bezier(1.0, 0.5, 0.8, 1.0);
}
.slide-fade-enter, .slide-fade-leave-to {
  opacity: 0;
}
 .mondayDialog{
   .modal-background{
     width: 100%;
     height: 100%;
      position: fixed;
      top: 0;
      left: 0;
      background: #333;
      opacity: 0.9;
      z-index: 999;
      transition: all 2s ease-out;
   }
   .close-dialog{
     width: 60px;
     height: 60px;
     background: linear-gradient(45deg, rgb(120,120,120) 0%, rgb(120, 120, 120) 50%, rgb(52, 52, 52) 50%, rgb(34, 34, 34) 61%);
     border-radius: 0 0 0 5px;
     position: absolute;
     top: 0;
     right: 0;
     a{
       color: rgb(120, 120,120);
       font-size: 40px;
       // font-weight: 400;
       position: absolute;
       right: 5px;
       top: -10px;
       transform: rotateZ(45deg);
       cursor: pointer;
     }
  }
   .content{
     width: 720px;
     position: fixed;
     top: 50%;
     left: 50%;
     transform: translate3d(-50%, -50%,0);
     padding: 60px 40px 40px;
     text-align: center;
     background: rgb(51, 51, 51);
     z-index: 1000;
     color: rgb(255, 255, 255);
     h3{
       font-size: 3vw;
       font-weight: 500;
       text-align: center;
       padding: 0;
       margin: 0;
     }
     p{
       padding: 5px;
     }
     .buttonBox{
       padding: 20px;
       width: 100%;
       height: 90px;
       input{
         width: 60%;
         float: left;
         height: 100%;
         border: none;
         text-align: center;
         border-radius: 30px 0 0 30px;
         color: #333;
         outline: none;
       }
       .sendButton{
         float: left;
         width: 40%;
         height: 100%;
         button{
           border: none;
           height: 100%;
           width: 100%;
           color: #333;
           background: orange;
           border-radius: 0 30px 30px 0;
           outline: none;
         }
         button:hover{
           opacity: 0.7;
         }
       }
     }

   }
 }
</style>

实现效果：

要点1 ：(css样式)

modal的背景div和内容的div都要固定定位。

modal的背景：z-index: 999;

.modal-background{
  width: 100%;
  height: 100%;
   position: fixed;
   top: 0;
   left: 0;
   background: #333;
   opacity: 0.9;
   z-index: 999;
   transition: all 2s ease-out;
}

modal的内容：z-index: 1000;

.content{
  width: 720px;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%, -50%,0);
  padding: 60px 40px 40px;
  text-align: center;
  background: rgb(51, 51, 51);
  z-index: 1000;
  color: rgb(255, 255, 255)
}

右上角的折角效果：

.close-dialog{
  width: 60px;
  height: 60px;
  background: linear-gradient(45deg, rgb(120,120,120) 0%, rgb(120120, 120) 50%, rgb(52, 52, 52) 50%, rgb(34, 34, 34) 61%);
  border-radius: 0 0 0 5px;
  position: absolute;
  top: 0;
  right: 0;
}

重要的是：background: linear-gradient(45deg, rgb(120,120,120) 0%, rgb(120120, 120) 50%, rgb(52, 52, 52) 50%, rgb(34, 34, 34) 61%);

button移上的时候，颜色变暗：

button{
  opacity: 0.7;
}

要点2 ：通过vue的父子组件的通信，控制modal的打开关闭

父组件中

<mondayDialog v-if='isShow' :show='isShow' @change='changeShow'/>

model通过 isShow 的值来确定是否显示，在父组件中点击来打开model.

<h3 @click='isShow = true'>点击打开dialog</h3>

父组件又将isShow的值传递给子组件，子组件中定义一个closeDia的方法，通过this.$emit('change',val),将更改后的值传递给父组件，使model关闭。

  <a @click='closeDia'>+</a>

props: ['show'],
methods: {
  closeDia () {
    this.show = this.opendialog
    this.opendialog  = false
    this.$emit('change',this.opendialog)
  }
}

在子组件中不能直接更改父组件传递过来的show的值，所以先将show的值赋值给b，更改b的值，将b传递给父组件，在父组件中，再将b的值赋值给show，来关闭model。