React如何实现鼠标追踪交互效果？说实话，这是一个hen有意思的问题，哈哈！

咱就是说鼠标追踪交互效果在现代网页设计中非常重要。你想想kan，当用户在页面上移动鼠标时我们Ke以通过各种酷炫的效果提升用户体验，对不对？

要实现鼠标追踪， 得知道鼠标在哪里。ReactUse 提供了一个超级方便的 Hook 叫Zuo useMouse。

import { useMouse } from "@reactuses/core";import { useRef } from "react";function MouseTracker { const boxRef = useRef<HTMLDivElement>; const mouse = useMouse; return </p> <p> 视口坐标: </p> <div ref={boxRef} style={{ width: , height: , background: "#f1f5f9", borderRadius: , position: "relative", overflow: "hidden", }} > <div style={{ width: , height: , borderRadius: "%", background: "#4f46e5", position: "absolute", left: mouse.elementX - , top: mouse.elementY - , pointerEvents: "none", transition: "opacity .15s", opacity: Number.isNaN ? : , }} /> <p style={{ padding: , margin: }}> 元素坐标: },{" "} {Math.round}) </p> </div> </div> );}

你kan，一行代码就Neng搞定鼠标位置的追踪，是不是hen爽？你懂的，这里面还内置了requestAnimationFrame批处理，不会出现撕裂帧的问题。

有时候我们还需要知道某个元素在页面上的位置和尺寸。手动实现的话，需要用getBoundingClientRect加上滚动和窗口大小变化的监听：

import { useEffect, useRef, useState } from "react";interface BoundingRect { x: number; y: number; width: number; height: number; top: number; right: number; bottom: number; left: number;}function ManualBounding { const boxRef = useRef<HTMLDivElement>; const = useState<BoundingRect>; useEffect => { const el = boxRef.current; if return; const update = => { const r = el.getBoundingClientRect; setRect; }; update; window.addEventListener; window.addEventListener; const ro = new ResizeObserver; ro.observe; return => { window.removeEventListener; window.removeEventListener; ro.disconnect; }; }, );return }</div>);}

害，光是想想就觉得麻烦，不是吗？还好有useElementBounding这个Hook。

import { useEffect, useState } from "react";function ManualPressDetector {const =useState;const =useState<string|null>;useEffect => {const onMouseDown= =>{setPressed;setSource;};const onTouchStart= =>{setPressed;setSource;};const onUp= =>{setPressed;setSource;};// 省略部分代码}

useMousePressed把所有这些封装成一行调用。返回,开箱即用支持鼠标、触摸和拖拽事件。

import React from 'react';function ***{console.log;console.log;console.log;console.log;console.log;return}

import React,{useState,useCallback}from'react';function ManualColorPicker{const =useState<string|null>;const isSupported=typeof window !=='

import React,{useState,useCallback}from'react';import{useEyeDropper}from'@reactuses/core';function***BaikeNotShoulu{return}