var box = document.getElementById("box"); var btn = document.getElementById("btn");  btn.onclick = function(event){ event.stopPropagation(); if(box.style.display = "none"){ box.style.display = "block"; console.log("1") }else{ box.style.display = "none"; console.log("2") }   }; window.onclick = function(){ box.style.display = "none" }
为什么console.log("2")不能执行,不管点几次按钮都只能执行console.log("1"),这是为什么??
                    
                    
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