jQuery method to add highlighting effect to website_jquery

The example in this article describes how jQuery can add highlighting effects to websites. Share it with everyone for your reference. The details are as follows:

This jquery code demonstrates how to mask the entire page and highlight something

$(function() {
  var docHeight = $(document).height();
  $("body").append("<div id='overlay'></div>");
  $("#overlay")
   .height(docHeight)
   .css({
     'opacity' : 0.4,
     'position': 'absolute',
     'top': 0,
     'left': 0,
     'background-color': 'black',
     'width': '100%',
     'z-index': 5000
   });
});

I hope this article will be helpful to everyone’s jQuery programming.