一般hover事件, 涉及到什么动画, 都很少用css的hover写了, 因为鼠标滑动到元素边缘, 会疯狂执行动画, 而且还是疯狂循环执行, 所以一般都用JavaScript控制
下面是一个有意思的鼠标划过按钮抖动效果, 特此记录一下
function JumpObj(elem, range, startFunc, endFunc) {
var curMax = range = range || 6;
startFunc = startFunc || function(){};
endFunc = endFunc || function(){};
var drct = 0;
var step = 1;
init();
function init() { elem.style.position = 'relative';active() }
function active() { elem.onmouseover = function(e) {if(!drct)jump()} }
function deactive() { elem.onmouseover = null }
function jump() {
var t = parseInt(elem.style.top);
if (!drct) motionStart();
else {
var nextTop = t - step * drct;
if (nextTop >= -curMax && nextTop <= 0) elem.style.top = nextTop + 'px';
else if(nextTop < -curMax) drct = -1;
else {
var nextMax = curMax / 2;
if (nextMax < 1) {motionOver();return;}
curMax = nextMax;
drct = 1;
}
}
setTimeout(function(){jump()}, 200 / (curMax+3) + drct * 3);
}
function motionStart() {
startFunc.apply(this);
elem.style.top='0';
drct = 1;
}
function motionOver() {
endFunc.apply(this);
curMax = range;
drct = 0;
elem.style.top = '0';
}
this.jump = jump;
this.active = active;
this.deactive = deactive;
}
JumpObj()函数有两个值, JumpObj(抖动元素, 抖动幅度), 比如JumpObj(box, 10);
