1、sublime只是工具可以换其他编辑器 下面直接上代码
2、按钮触发事件这是缩小的效果点击查看
3、按钮触发事件这是放大的效果点击查看
4、function detectZoom (){
var ratio = 0,
screen = window.screen,
ua = navigator.userAgent.toLowerCase();
if (window.devicePixelRatio !== undefined) {
ratio = window.devicePixelRatio;
}
else if (~ua.indexOf('msie')) {
if (screen.deviceXDPI && screen.logicalXDPI) {
ratio = screen.deviceXDPI / screen.logicalXDPI;
}
}
else if (window.outerWidth !== undefined && window.innerWidth !== undefined) {
ratio = window.outerWidth / window.innerWidth;
}
if (ratio){
ratio = Math.round(ratio * 100);
}
return ratio;
};
