本文实例为大家分享了图片缓慢放大缩小js实现代码,供大家参考,具体内容如下
<!DOCTYPE html>
<html lang=\"en\">
<head>
<meta charset=\"UTF-8\">
<title>图片的缓慢缩放</title>
</head>
<script>
window.onload = function(){
var btn_big = document.getElementById(\"big\");
var btn_small = document.getElementById(\"small\");
var pic = document.getElementById(\"pic\");
//缓慢放大
btn_big.onclick = function(){
var width = parseInt(pic.style.width);
var i = width;
var count = 0;
console.log(width);
var timer = setInterval(function(){
count++;
i++;
pic.style.width = i + \"%\";
if(count == 10 ){
clearInterval(timer);
}else if( i > 50){
btn_big.onclick = function(e){
btn_big.onclick = null;
};
}
},13);
};
//缓慢缩小
btn_small.onclick = function(){
var width = parseInt(pic.style.width);
var count = 0;
if(width == 10){
alert(\"图片已最小!!\");
return false;
}
console.log(width);
var timer2 = setInterval(function(){
count++;
width--;
pic.style.width = width +\"%\";
if(count == 10){
clearInterval(timer2);
}else if( width < 10){
btn_small.onclick = null;
}
},13);
}
}
</script>
<style>
#pic{
width: 20%;
}
</style>
<body>
<div id=\"pic\" style=\"width: 20%\">
<img src=\"3.pic.jpg\" style=\"width:100%;\">
</div>
<div class=\"scale\">
<button id=\"big\">放大</button> <button id=\"small\">缩小</button>
</div>
</body>
</html>
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