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js代码实现:点击后商品飞进购物车(抛物线)
<!DOCTYPE htML> <html> <head> <meta charset="UTF-8"> <tITle></title> <style type="text/css"> #sBox{ position: absolute; left: 50px; top: 500px; width: 50px; height: 50px; background: red; } #cart{ position: fixed; top: 50px; right: 20px; width: 100px; height: 40px; border: 1px solid red; } </style> </head> <body> <p id="sBox">某商品</p> <p id="cart">购物篮</p> <input type="button" name="BTn" id="btn" value="抛物线" /> <script type="text/javascript"> VAR oSbox = document.getElementById("sBox"); var oCart = document.getElementById("cart"); var oBtn = document.getElementById("btn"); var timer = null; var count = 0; oBtn.onclick = function(){ var x1 = oSbox.offsetLeft; var y1 = oSbox.offsetTop; var x2 = oCart.offsetLeft; var y2 = oCart.offsetTop; //平移抛物经过原点,可以得到c==0 //已知a var a = 0.0005; var b = (y2-y1 - a*(x2-x1)*(x2-x1))/(x2-x1); timer = setInterval(function(){ count+=10; var x = count; var y = a*x*x + b*x; oSbox.style.left = x1 + x + "px"; oSbox.style.top = y1 + y + "px"; if(oSbox.offsetLeft >= x2){ clearInterval(timer); } },30) } </script> </body> </html>
js代码实现:点击后商品飞进购物车(抛物线)
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> #sBox{ position: absolute; left: 50px; top: 500px; width: 50px; height: 50px; background: red; } #cart{ position: fixed; top: 50px; right: 20px; width: 100px; height: 40px; border: 1px solid red; } </style> </head> <body> <p id="sBox">某商品</p> <p id="cart">购物篮</p> <input type="button" name="btn" id="btn" value="抛物线" /> <script type="text/javascript"> var oSbox = document.getElementById("sBox"); var oCart = document.getElementById("cart"); var oBtn = document.getElementById("btn"); var timer = null; var count = 0; oBtn.onclick = function(){ var x1 = oSbox.offsetLeft; var y1 = oSbox.offsetTop; var x2 = oCart.offsetLeft; var y2 = oCart.offsetTop; //平移抛物经过原点,可以得到c==0 //已知a var a = 0.0005; var b = (y2-y1 - a*(x2-x1)*(x2-x1))/(x2-x1); timer = setInterval(function(){ count+=10; var x = count; var y = a*x*x + b*x; oSbox.style.left = x1 + x + "px"; oSbox.style.top = y1 + y + "px"; if(oSbox.offsetLeft >= x2){ clearInterval(timer); } },30) } </script> </body> </html>
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