JS Judgment page Zoom in and zoom out

Project, often encounter the page is enlarged or reduced, resulting in page display error, JS can judge the page zoom out.

If return 100 is the default no scaling, if greater than 100 is magnified, otherwise shrink 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/wi ndow.innerwidth;  }      if (ratio) {    ratio = Math.Round (ratio *);  }      return ratio;};

The Window.onresize event can be used to detect if a page has triggered a zoom in or zoom out.

JS Judgment page Zoom in and zoom out