<div id="app">
    <dialog-instance ref="dialog">
    <div class="dialog-custom-content">this is the dialog content</div>
  </dialog-instance>
  <div class="demo-container">
    <button @click="showDialog" class="demo-button">click me show dialog</button>
  </div>
</div>

<script type="text/x-template" id="dialog">
  <div class="dialog-container">
    <div
      :class="['dialog-mask', visible && 'fade-in', !showMask && 'hide-mask']"
      @click="closeMask"
    />
    <div
      class="dialog-content"
      @click.stop=""
    >
      <slot />
    </div>
  </div>
</script>
// dialog style
.dialog-mask {
  width: 100%;
  height: 100%;
  position: fixed;
  left: 0;
  top: 0;
  background: rgba(0, 0, 0, 0.19);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.dialog-content {
  visibility: hidden;
  min-height: 1rem;
  min-width: 1rem;
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate3d(-50%, -50%, 0) scale(0.7);
  transform-origin: center;
  opacity: 0;
  transition: all 0.3s;
}

.fade-in {
  visibility: visible;
  opacity: 1;
  & + .dialog-content {
    visibility: visible;
    transform-origin: center;
    transform: translate3d(-50%, -50%, 0) scale(1);
    opacity: 1;
  }
}

.hide-mask {
  visibility: hidden;
}

// demo style

.demo-container {
  padding: 100px 0;
}
.demo-button {
  padding: 10px;
  display: block;
  margin: 0 auto;
  &:hover {
    background: #eee;
  }
}

.dialog-custom-content {
  padding: 52px;
  background: #fff;
  border-radius: 4px;
}
View Compiled
Vue.component('dialog-instance',{
  template: "#dialog",
  props: {
    // 点击遮罩是否关闭
    // click mask close
    maskClose: {
      type: Boolean,
      default: true
    },
    // 是否展示遮罩层
    // control mask display
    showMask: {
      type: Boolean,
      default: true
    },
    disableScroll: {
      type: Boolean,
      default: false
    },
    callback: {
      type: Function,
      default: function () {}
    }
  },
  data() {
    return {
      visible: false
    };
  },
  mounted() {
    const body = document.querySelector("body");
    if (body.append) {
      body.append(this.$el);
    } else {
      body.appendChild(this.$el);
    }
  },
  methods: {
    open() {
      this._disableScroll();
      this.visible = true;
    },
    close() {
      this.visible = false;
      document.documentElement.style.overflow = "";
      this.callback && this.callback();
    },
    _disableScroll() {
      if (this.disableScroll)
        document.documentElement.style.overflow = "hidden";
    },
    closeMask() {
      if (!this.maskClose) return;
      this.close();
    }
  }
});



new Vue({
  el: "#app",
  methods: {
    showDialog() {
      this.$refs['dialog'].open();
    }
  }
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.11/vue.min.js