jumplee

function isScrolledIntoView(elem)
{
    var $elem = $(elem);
    var $window = $(window);

    var docViewTop = $window.scrollTop();
    var docViewBottom = docViewTop + $window.height();

    var elemTop = $elem.offset().top;
    var elemBottom = elemTop + $elem.height();

jumplee

function fun1(){
  var dfd=$.Deferred();
  setTimeout(function(){
    console.log('---fun1---');
    console.log((new Date()));
    dfd.resolve();
  },2000);
  return dfd.promise();
}
function fun2(){

jumplee

导致ios出现memory warning 闪退的css

//不能加这种代码，导致ios出现memory warning 闪退
.x-list .x-list-item{
//  -webkit-transform: translate3d(0, 0, 0);
//  -webkit-transform-style: preserve-3d;
//  -webkit-backface-visibility: hidden;
}