js節流の手ぶれ防止の応用シーンと、Vueでの節流の手ぶれ防止の具体的な実現操作

    throttle: function(){
      let that = this
      let now = +new Date();
      if(lastTime && lastTime - now < 2000){
        clearTimeout(timer)
      }
      timer = setTimeout(function () {
        console.log('  ')
        lastTime = +new Date()
      },200)
    }

function debounce(fn, wait) {
 let timeout = null
 return function() {
  if(timeout !== null) clearTimeout(timeout)   
  timeout = setTimeout(fn, wait);
 }
}
function handle() {  
 console.log(Math.random())
}
window.addEventListener('scroll', debounce(handle, 1000))

function throttle(fn, delay) { 
 var prev = Date.now()     
 return function() {        
  var now = Date.now()        
  if (now - prev > delay) {          
   fn()        
   prev = Date.now()       
  }     
 }    
}    
function handle() {      
 console.log(Math.random())   
}
window.addEventListener('scroll', throttle(handle, 1000))

let timeout = null
function debounce(fn, wait) {
 if(timeout !== null) clearTimeout(timeout)
 timeout = setTimeout(fn, wait)
}
export default debounce

<input type="text" @input="debounceInput($event)">
 
import debounce from './utils'
export default {
 methods: {
  debounceInput(E){
   debounce(() => {
    console.log(E.target.value)
   }, 1000)
  }
 }
}

<template>
 <el-input v-bind="$attrs" @input="debounceInput"/>
</template>
<script>
export default {
 data() {
  return {
   timeout: null
  }
 },
 methods: {
  debounceInput(value){
   if(this.timeout !== null) clearTimeout(this.timeout)   
   this.timeout = setTimeout(() => {
    this.$emit('input', value)
   }, 1000)
  }
 }
}
</script>

<template>
 <debounce-input placeholder="  " prefix-icon="el-icon-search" @input="inputEve"></debounce-input>
</template>
<script>
import debounceInput from './debounce-input'
export default {
 methods: {
  inputEve(value){
   console.log(value)
  }
 },
 components: {
  debounceInput
 }
}
</script>

export default () => {
 functional: true, 
 props: { 
  // Props     
 },
 //          ,             
 render: function (createElement, context) {
  return vNode
 }
}

<my-functional-component>
 <p v-slot:foo>
  first
 </p>
 <p>second</p>
</my-functional-component>

const debounce = (fun, delay = 500, before) => {
 let timer = null
 return (params) => {
  timer && window.clearTimeout(timer)
  before && before(params)
  timer = window.setTimeout(() => {
    // click  fun Function input  fun Array
   if (!Array.isArray(fun)) {
    fun = [fun]
   }
   for (let i in fun) {
    fun[i](params)
   }
   timer = null
  }, parseInt(delay))
 }
}
export default {
 name: 'Debounce',
 functional: true, //          functional                   
 render(createElement, context) {
  const before = context.props.before
  const time = context.props.time
  const vnodeList = context.slots().default
  if (vnodeList === undefined){
   console.warn('<debounce>          ')
   return null
  }
  const vnode = vnodeList[0] || null //        dom
  if (vnode.tag === 'input') {
   const defaultFun = vnode.data.on.input
   const debounceFun = debounce(defaultFun, time, before) //       
   vnode.data.on.input = debounceFun
  } else if (vnode.tag === 'button') {
   const defaultFun = vnode.data.on.click
   const debounceFun = debounce(defaultFun, time, before) //       
   vnode.data.on.click = debounceFun
  } else if (vnode.componentOptions && vnode.componentOptions.tag === 'el-input') {
   const defaultFun = vnode.componentOptions.listeners.input
   const debounceFun = debounce(defaultFun, time, before) //       
   vnode.componentOptions.listeners.input = debounceFun
  } else if (vnode.componentOptions && vnode.componentOptions.tag === 'el-button') {
   const defaultFun = vnode.componentOptions.listeners.click
   const debounceFun = debounce(defaultFun, time, before) //       
   vnode.componentOptions.listeners.click = debounceFun
  } else {
   console.warn('<debounce>                     el-button、el-input、button、input')
   return vnode
  }
  return vnode
 }
}

<template>
 <debounce time="300" :before="beforeFun">
  <input type="text" v-model="inpModel" @input="inputChange"/>
 </debounce>
</template>
 
<script>
import debounce from './debounce'
export default {
 data() {
  return {
   inpModel: 1
  }
 },
 methods: {
  inputChange(e){
   console.log(e.target.value, '  ')
  },
  beforeFun(e){
   console.log(e.target.value, '   ')
  }
 },
 components: {
  debounce
 }
}
</script>