全局el-modal弹窗封装

最新推荐文章于 2024-07-26 16:20:18 发布

原创最新推荐文章于 2024-07-26 16:20:18 发布 · 407 阅读

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CC 4.0 BY-SA版权

文章标签：

#vue.js #javascript #前端 #elementui #html

文章介绍了如何在Vue项目中使用自定义的modal组件，包括引入、混合方法、拖拽指令的实现以及如何调用和销毁弹框。作者展示了如何在main.js中引入并配置该插件，以及在组件中使用示例。

1.主文件

import Vue from 'vue'
import mixins from './mixins'
import store from '@/store'
import router from '@/router'

function getModalInstance(component) {
  if (!component.methods) {
    component.methods = {}
  }
  component.methods.destroy = mixins.methods.destroy
  component.directives = mixins.directives
  const ModalInstanceConstructor = Vue.extend(component)
  return new ModalInstanceConstructor()
}
export const modalObj = {
  show(cmp, payload, callback) {
    return new Promise((resolve, reject) => {
      if (cmp) {
        const Instance = getModalInstance(cmp.default)
        Instance.payload = payload
        Instance.resolve = resolve
        Instance.callback = callback
        // 注入store,router
        Instance.$$store = Instance.$store = store
        Instance.$$router = router
        const component = Instance.$mount()
        document.body.appendChild(component.$el)
        const modal = Instance.$children[0]
        modal.hide = () => {
          Instance.visible = false
          Instance.destroy()
        }
        Instance.visible = true
        // modal.$emit('update:visible', false)
      } else {
        reject(new Error('modal组件未找到'))
      }
    })
  }
}

export default {
  install: vue => {
    vue.prototype.$modal = modalObj
  }
}

2.混合引入

export default {
  methods: {
    data() {
      return {
        visible: false,
        isDestroy: false
      }
    },
    destroy() {
      if (!this.isDestroy) {
        this.visible = false
        this.isDestroy = true
        setTimeout(() => {
          this.$destroy()
          document.body.removeChild(this.$el)
        }, 300)
      }
    }
  },
  directives: {
    drag: {
      bind(el, binding, vnode) {
        const dialogHeaderEl = el.querySelector('.el-dialog__header')
        const dragDom = el.querySelector('.el-dialog')
        dialogHeaderEl.style.cssText += ';cursor:move;'
        dragDom.style.cssText += ';top:0px;'

        // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
        const getStyle = (() => {
          if (window.document.currentStyle) {
            return (dom, attr) => dom.currentStyle[attr]
          }
          return (dom, attr) => getComputedStyle(dom, false)[attr]
        })()

        dialogHeaderEl.onmousedown = eD => {
          // 鼠标按下，计算当前元素距离可视区的距离
          const disX = eD.clientX - dialogHeaderEl.offsetLeft
          const disY = eD.clientY - dialogHeaderEl.offsetTop

          const dragDomWidth = dragDom.offsetWidth
          const dragDomHeight = dragDom.offsetHeight

          const screenWidth = document.body.clientWidth
          const screenHeight = document.body.clientHeight

          const minDragDomLeft = dragDom.offsetLeft
          const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth

          const minDragDomTop = dragDom.offsetTop
          const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomHeight

          // 获取到的值带px 正则匹配替换
          let styL = getStyle(dragDom, 'left')
          let styT = getStyle(dragDom, 'top')

          if (styL.includes('%')) {
            // eslint-disable-next-line no-useless-escape
            styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100)
            // eslint-disable-next-line no-useless-escape
            styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100)
          } else {
            styL = +styL.replace(/\px/g, '')
            styT = +styT.replace(/\px/g, '')
          }

          document.onmousemove = eM => {
            // 通过事件委托，计算移动的距离
            let left = eM.clientX - disX
            let top = eM.clientY - disY

            // 边界处理
            if (-left > minDragDomLeft) {
              left = -minDragDomLeft
            } else if (left > maxDragDomLeft) {
              left = maxDragDomLeft
            }

            if (-top > minDragDomTop) {
              top = -minDragDomTop
            } else if (top > maxDragDomTop) {
              top = maxDragDomTop
            }

            // 移动当前元素
            dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`

            // emit onDrag event
            vnode.child.$emit('dragDialog')
          }

          document.onmouseup = () => {
            document.onmousemove = null
            document.onmouseup = null
          }
        }
      }
    }
  }
}

3.使用

# 弹框插件使用

调用弹框

```js
// 一、调用弹框
this.$modal.show(require('./modals/openModel'), { openData: row.id }).then((data)=>{})

// 二、弹框获取参数
this.payload.openData

// 三、执行回调
//多类型回调
this.resolve('setting')
//单个回调
this.resolve()
//销毁弹框
this.destroy()
```

4.main.js-------------引入

import modal from '@/utils/Modal'

Element.Dialog.props.closeOnClickModal.default = false

Vue.use(Element, { size: 'mini', zIndex: 3000 })

Vue.use(modal)