web前端|js教程
拖动滑块,点击水波纹,js
web前端-js教程
本篇文章就给大家介绍js实现拖动滑块效果和点击水波纹效果的方法。有一定的参考价值，有需要的朋友可以参考一下，希望对你们有所帮助。
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拖动滑块效果：
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先看看效果图：
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添加change事件
0
添加定时器
0
用鼠标拖动小方块0%
0
window.onload = function() {var lineDiv = document.getElementById(lineDiv); //长线条var minDiv = document.getElementById(minDiv); //小方块var msg = document.getElementById("msg");var vals = document.getElementById("vals");var ifBool = false; //判断鼠标是否按下//鼠标按下方块minDiv.addEventListener("touchstart", function(e) {e.stopPropagation();ifBool = true;console.log("鼠标按下")});//拖动window.addEventListener("touchmove", function(e) {console.log("鼠标拖动")if(ifBool) {var x = e.touches[0].pageX || e.touches[0].clientX; //鼠标横坐标var xvar lineDiv_left = getPosition(lineDiv).left; //长线条的横坐标var minDiv_left = x - lineDiv_left; //小方块相对于父元素（长线条）的left值 if(minDiv_left >= lineDiv.offsetWidth - 15) {minDiv_left = lineDiv.offsetWidth - 15;}if(minDiv_left < 0) {minDiv_left = 0;}//设置拖动后小方块的left值minDiv.style.left = minDiv_left + "px";msg.innerText = parseInt((minDiv_left / (lineDiv.offsetWidth - 15)) * 100);vals.innerText = parseInt((minDiv_left / (lineDiv.offsetWidth - 15)) * 100);}});//鼠标松开window.addEventListener("touchend", function(e) {console.log("鼠标弹起")ifBool = false;});//获取元素的绝对位置function getPosition(node) {var left = node.offsetLeft; //获取元素相对于其父元素的left值var leftvar top = node.offsetTop;current = node.offsetParent; // 取得元素的offsetParent // 一直循环直到根元素while(current != null) {left += current.offsetLeft;top += current.offsetTop;current = current.offsetParent;}return {"left": left,"top": top};}}
兼容PC端和移动端
用鼠标拖动小方块0%
0
window.onload = function() {var lineDiv = document.getElementById(lineDiv); //长线条var minDiv = document.getElementById(minDiv); //小方块var msg = document.getElementById("msg");var vals = document.getElementById("vals");var ifBool = false; //判断鼠标是否按下//事件var start = function(e) {e.stopPropagation();ifBool = true;console.log("鼠标按下")}var move = function(e) {console.log("鼠标拖动")if(ifBool) {if(!e.touches) { //兼容移动端var x = e.clientX;} else {//兼容PC端var x = e.touches[0].pageX;}//var x = e.touches[0].pageX || e.clientX; //鼠标横坐标var xvar lineDiv_left = getPosition(lineDiv).left; //长线条的横坐标var minDiv_left = x - lineDiv_left; //小方块相对于父元素（长线条）的left值 if(minDiv_left >= lineDiv.offsetWidth - 15) {minDiv_left = lineDiv.offsetWidth - 15;}if(minDiv_left < 0) {minDiv_left = 0;}//设置拖动后小方块的left值minDiv.style.left = minDiv_left + "px";msg.innerText = parseInt((minDiv_left / (lineDiv.offsetWidth - 15)) * 100);vals.innerText = parseInt((minDiv_left / (lineDiv.offsetWidth - 15)) * 100);}}var end = function(e) {console.log("鼠标弹起")ifBool = false;}//鼠标按下方块minDiv.addEventListener("touchstart", start);minDiv.addEventListener("mousedown", start);//拖动window.addEventListener("touchmove", move);window.addEventListener("mousemove", move);//鼠标松开window.addEventListener("touchend", end);window.addEventListener("mouseup", end);//获取元素的绝对位置function getPosition(node) {var left = node.offsetLeft; //获取元素相对于其父元素的left值var leftvar top = node.offsetTop;current = node.offsetParent; // 取得元素的offsetParent // 一直循环直到根元素while(current != null) {left += current.offsetLeft;top += current.offsetTop;current = current.offsetParent;}return {"left": left,"top": top};}}
设置滑块的滑动范围
用鼠标拖动小方块0%
window.onload = function() {var lineDiv = document.getElementById(lineDiv); //长线条var minDiv = document.getElementById(minDiv); //小方块var minVals = document.getElementById(vals); //左长线var msg = document.getElementById("msg"); //最上面的信息var ifBool = false; //判断滑块是否按下var lineDiv_W = getPosition(lineDiv).width; //长线的长度var lineDiv_L = getPosition(lineDiv).left; //长线距离html的leftvar minDiv_W = getPosition(minDiv).width; //滑块的长度var minDiv_L = getPosition(minDiv).left; //滑块距离html的leftvar Slider_W_MAX = lineDiv_W - minDiv_W; //滑块可以滑动的最大值px，范围是0~Slider_W_MAXvar minNum = 0; //最小值var maxNum = 500; //最大值var startNum = 100; //起始值var endNum = 400; //结束值var min_Px = Slider_W_MAX / maxNum * startNum; //滑块可以滑动的最小pxvar max_Px = Slider_W_MAX / maxNum * endNum; //滑块可以滑动的最大pxvar minDiv_left=0; //当前滑块的位置/* Slider_W_MAX1元对应的px？ 1maxNum 1 1px对应的金额？*/function initSlider(initPX) { //设置滑块的初始位置console.log(initPX);minDiv_left=initPX; //设置滑块的位置minDiv.style.left = initPX + "px";minVals.style.width = initPX + "px";msg.innerText = parseInt(initPX / Slider_W_MAX * 100);}(function() { //初始化滑块位置if(startNum >= 0) { //求出startNum对应的pxinitSlider(Slider_W_MAX / maxNum * startNum)}})()//事件var start = function(e) {ifBool = true;//console.log("鼠标按下")}var move = function(e) {//console.log("鼠标拖动")if(ifBool) {var x; //记录滑块距离html的距离leftif(!e.touches) { //兼容PC端x = e.clientX;} else { //兼容移动端x = e.touches[0].pageX;}minDiv_left = x - lineDiv_L; //小方块相对于父元素（长线条）的left值 if(minDiv_left >= Slider_W_MAX) {minDiv_left = Slider_W_MAX;}if(minDiv_left max_Px){initSlider(max_Px);}if(minDiv_left<min_Px){initSlider(min_Px);}ifBool = false;}//鼠标按下方块minDiv.addEventListener("touchstart", start);minDiv.addEventListener("mousedown", start);//拖动window.addEventListener("touchmove", move);window.addEventListener("mousemove", move);//鼠标松开window.addEventListener("touchend", end);window.addEventListener("mouseup", end);//获取元素的绝对位置function getPosition(node) {var width = node.offsetWidth; //元素宽度var height = node.offsetHeight; //元素高度var left = node.offsetLeft; //获取元素相对于其根元素的left值var leftvar top = node.offsetTop; //获取元素相对于其根元素的top值var topcurrent = node.offsetParent; // 取得元素的offsetParent// 一直循环直到根元素while(current != null) {left += current.offsetLeft;top += current.offsetTop;current = current.offsetParent;}return {"width": width,"height": height,"left": left,"top": top};}}
点击水波纹效果：
项目一项目二项目三$("ul li").click(function(e) {if($(this).hasClass(slider)) {return;}var whatTab = $(this).index();var howFar = 160 * whatTab;$(".slider").css({left: howFar + "px"});$(".ripple").remove();var posX = $(this).offset().left,posY = $(this).offset().top,buttonWidth = $(this).width(),buttonHeight = $(this).height();console.log(posX, posY, buttonWidth, buttonHeight)$(this).append("");if(buttonWidth >= buttonHeight) {buttonHeight = buttonWidth;} else {buttonWidth = buttonHeight;}var x = e.pageX - posX - buttonWidth / 2;var y = e.pageY - posY - buttonHeight / 2;$(".ripple").css({width: buttonWidth,height: buttonHeight,top: y + px,left: x + px}).addClass("rippleEffect");});
总结：
