阻止浏览器缩放

Posted 2021-02-21 baiyis

注: 依赖jquery

$(document).ready(() => {
    //阻止页面缩放
    stopPageScale()

})


// 获得页面缩放比例
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;
};

//阻止页面缩放
var beforeRatio = detectZoom();
function stopPageScale(){
    //一般电脑的缩放比例都在100~150之间（根据需要可改变默认缩放比例）
    if(beforeRatio <= 100){
        beforeRatio = 100//此处设置最小缩放为100
    }else if(beforeRatio >= 150){
        beforeRatio = 150//此处设置最大缩放为150
    }
    console.log(beforeRatio)
    var scal = beforeRatio/detectZoom();
    $(‘body‘).css(‘zoom‘,scal)
}
//动态计算页面缩放程度
window.onresize = function(){
    stopPageScale()
}