$(document).ready(function() {
  $('#id').replaceWith('
<DIV>I have been replaced</DIV>
 
');
});

$(document).ready(function() {
  window.setTimeout(function() {
    // do something
  }, 1000);
});

$(document).ready(function() {
  var el = $('#id');
  el.html(el.html().replace(/word/ig, ""));
});

$(document).ready(function() {
  if ($('#id').length) {
   // do something
 }
});

$(document).ready(function() {
  $("div").click(function(){
     //get the url from href attribute and launch the url
   window.location=$(this).find("a").attr("href"); return false;
  });// how to use<DIV><A href="index.html">home</A></DIV>});

$(document).ready(function() {
  function checkWindowSize() {
    if ( $(window).width() > 1200 ) {
    $('body').addClass('large');
  }  else {
    $('body').removeClass('large');
  }
  }
$(window).resize(checkWindowSize);
});

$(document).ready(function() {
  var cloned = $('#id').clone();// how to use<DIV id=id></DIV>});

$(document).ready(function() {
 jQuery.fn.center = function () {
    this.css("position","absolute");
       this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
          this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
             return this;
 }
 $("#id").center();
});

$(document).ready(function() {
  $.extend($.expr[':'], {
    moreThen1000px: function(a) {
         return $(a).width() > 1000;
   }
  });
 $('.box:moreThen1000px').click(function() {
    // creating a simple js alert box
   alert('The element that you have clicked is over 1000 pixels wide');
 });
});

$(document).ready(function() {
  $("p").size();
});

$(document).ready(function() {
  $("ul").addClass("Replaced");
  $("ul > li").prepend(""); // how to use
 ul.Replaced { list-style : none; }
});

//Example 1
<SCRIPT src="/UploadFiles/2021-04-02/jsapi">

34. 禁用Jquery（动画）效果




$(document).ready(function() {
  jQuery.fx.off = true;
});



35. 与其他Javascript类库冲突解决方案




$(document).ready(function() {
  var $jq = jQuery.noConflict();
  $jq('#id').show();
});


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