1、el-dialog弹窗拖拽:
// v-dialogDrag: 弹窗拖拽
Vue.directive('dialogDrag', {
bind (el, binding, vnode, oldVnode) {
const dialogHeaderEl = el.querySelector('.el-dialog__header')
const dragDom = el.querySelector('.el-dialog')
dialogHeaderEl.style.cursor = 'move'
// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
dialogHeaderEl.onmousedown = (e) => {
// 鼠标按下,计算当前元素距离可视区的距离
const disX = e.clientX - dialogHeaderEl.offsetLeft
const disY = e.clientY - dialogHeaderEl.offsetTop
// 获取到的值带px 正则匹配替换
let styL, styT
// 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
if (sty.left.includes('%')) {
styL = +document.body.clientWidth * (+sty.left.replace(/%/g, '') / 100)
styT = +document.body.clientHeight * (+sty.top.replace(/%/g, '') / 100)
} else {
styL = +sty.left.replace(/px/g, '')
styT = +sty.top.replace(/px/g, '')
}
document.onmousemove = function (e) {
// 通过事件委托,计算移动的距离
const l = e.clientX - disX
const t = e.clientY - disY
// 移动当前元素
dragDom.style.left = `${l + styL}px`
dragDom.style.top = `${t + styT}px`
// 将此时的位置传出去
// binding.value({x:e.pageX,y:e.pageY})
}
document.onmouseup = function (e) {
document.onmousemove = null
document.onmouseup = null
}
}
}
})
2、阻止按钮鼠标双击重复提交
// 提交阻止重复
Vue.directive('dbClick', {
inserted (el, binding) {
el.addEventListener('click', e => {
if (!el.disabled) {
el.disabled = true
el.style.cursor = 'not-allowed'
setTimeout(() => {
el.style.cursor = 'pointer'
el.disabled = false
}, 1500)
}
})
}
})
3、输入框失焦后去除左右空格(区别v-model.trim的语法糖)
// v-trim: 输入框失焦过滤两边空格
Vue.directive('trim', {
inserted: el => {
let inputEle = getInput(el)
const handler = (event) => {
const newVal = event.target.value.trim()
if (event.target.value !== newVal) {
event.target.value = newVal
dispatchEvent(inputEle, 'input')
}
}
el.inputEle = inputEle
el._blurHandler = handler
inputEle.addEventListener('blur', handler)
},
unbind: el => {
const { inputEle } = el
inputEle.removeEventListener('blur', el._blurHandler)
}
})
如果你对vue自定义指令的基本使用方法有疑惑,请参考此博客:Vue自定义指令_轮孑哥的博客-CSDN博客