變速動畫函數封裝 勻速動畫：每次步數都是10 (var step=10;) 變速(緩動)動畫：每次的步數是用當前位置和目標位置相減 var step=(target-current)/10; 代碼如下: <!DOCTYPE html> <html lang="en"> <head> <meta ch ...
變速動畫函數封裝
勻速動畫：每次步數都是10 (var step=10;)
變速(緩動)動畫：每次的步數是用當前位置和目標位置相減 var step=(target-current)/10;
代碼如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>title</title> <style> * { margin: 0; padding: 0; } div { margin-top: 20px; width: 200px; height: 100px; background-color: green; position: absolute; left: 0; top: 0; } </style> </head> <body> <input type="button" value="移動到400px" id="btn1" /> <input type="button" value="移動到800px" id="btn2" /> <div id="dv"> <script src="common.js"></script> <script> //點擊按鈕移動div my$("btn1").onclick = function () { animate(my$("dv"), 400); }; my$("btn2").onclick = function () { animate(my$("dv"), 800); }; //變速動畫函數 function animate(element, target) { //清理定時器 clearInterval(element.timeId); element.timeId = setInterval(function () { //獲取元素的當前位置 var current = element.offsetLeft; //移動步數 var step = (target - current) / 10; step = step > 0 ? Math.ceil(step) : Math.floor(step); current += step; element.style.left = current + "px"; if (current == target) { //清理定時器 clearInterval(element.timeId); } //測試代碼 console.log("目標位置:" + target + "，當前位置:" + current + "，步數:" + step); }, 20); } </script> </div> </body> </html>
