js 实现点击一次图片旋转90度，再点击再转90度
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>旋转图片</title>
<script>
window.onload = function(){
var current = 0;
document.getElementById('xz').onclick = function(){
current = (current+90)%360;
document.getElementById('target').style.transform = 'rotate('+current+'deg)';
}
};
</script>
</head>
<body>
<img id ="target" src="https://pdbn.top/wp-content/themes/pdbn/img/pdbntop128.png" alt="">
<button id ="xz">旋转</button>
</body>
</html>
[runcode]< !doctype html>
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