【前端】Vue项目:旅游App-(24)useScroll:加强useScroll的功能性,监听窗口和页面的滚动

本项目博客总结:【前端】Vue项目:旅游App-博客总结

窗口和页面滚动相关链接:【前端】如何判断是页面滚动还是窗口滚动_karshey的博客-CSDN博客

import {
    
     ref } from "vue"
import {
    
     onMounted, onUnmounted } from '@vue/runtime-core';
import {
    
     throttle } from 'underscore'

export default function useScroll(elRef) {
    
    
    let el = window
    const isReachBottom = ref(false)
    const isDetailShowTabControl=ref(false)
    const clientHeight = ref(0)
    const scrollTop = ref(0)
    const scrollHeight = ref(0)

    // 监听屏幕滚动:这里是窗口的滚动
    const scrollListener = throttle(() => {
    
    
        // 监听窗口的滚动
        if (el === window) {
    
    
            // 客户的屏幕长度
            clientHeight.value = document.documentElement.clientHeight
            // 当前距离顶部长度
            scrollTop.value = document.documentElement.scrollTop
            // 页面总体长度
            scrollHeight.value = document.documentElement.scrollHeight
        }
        // 监听页面的滚动
        else {
    
    
            clientHeight.value = el.clientHeight
            scrollTop.value = el.scrollTop
            scrollHeight.value = el.scrollHeight
        }
        if (scrollHeight.value <= scrollTop.value + clientHeight.value) {
    
    
            console.log('滚动到底部')
            isReachBottom.value = true
        }
        if(scrollTop.value>=540){
    
    
            isDetailShowTabControl.value=true
        }else{
    
    
            isDetailShowTabControl.value=false
        }

        // console.log('监听到滚动')
        // console.log(scrollTop.value,isDetailShowTabControl.value)
    }, 100)

    onMounted(() => {
    
    
        if (elRef) {
    
    
            el = elRef.value
        }
        el.addEventListener('scroll', scrollListener)
    })

    onUnmounted(() => {
    
    
        el.removeEventListener('scroll', scrollListener)
    })

    return {
    
     isReachBottom, scrollTop, scrollHeight,clientHeight,isDetailShowTabControl }
}

若不传入elRef,或传入为空,则监听窗口window的滚动。

传入elRef则是对应页面的响应式(此处对页面的定义:设置了高度)。

举个例子:

这里detailRef是detail这个元素对应页面的响应式。

<div class="detail top-page" ref="detailRef">

调用,这里的useScroll监听的是detail页面。

useScroll(detailRef)

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转载自blog.csdn.net/karshey/article/details/129011728
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