javascript - 将变量传递给javascript函数的问题

Question

出于某种原因，当我将鼠标悬停在这些对象上时，无论我收到什么错误警报。为什么？

function hoverEffect(listType, button, animatedObject){

    var button = $(button), animatedObject = $(animatedObject), listType = $(listType);

  if($(listType) == true){

    $(button).hover(function(){
    alert("listType = true");
      $(this).stop(true, true);
      $(this).toggleClass("mouseIn", 1000, 'easeOutQuint');
    }, function(){
      $(this).stop(true, true);
      $(this).removeClass("mouseIn",  1000, 'easeOutQuint');
    });

  }else{

    $(button).hover(function(){  
    alert("listType = false");
      $(animatedObject).stop(true, true);
      $(animatedObject).toggleClass("mouseIn", 1000, 'easeOutQuint');
    }, function(){
      $(animatedObject).stop(true, true);
      $(animatedObject).removeClass("mouseIn",  1000, 'easeOutQuint');
    });

  }


}



hoverEffect(false, "#globalNavButton", "#globalNavButton");
hoverEffect(false, "#reelButton", "#reelButton");
hoverEffect(true, ".listHover");

Answer 1

换行

if($(listType) == true){

到

if($(listType).length > 0){