javascript - Noob javascript 1行解释

Question

下面这行是做什么的？

(flag)?flag=false:flag=true;

在这段代码中:

  var flag = true;
    function resize() {
        if(flag) {
            document.getElementById("centerimg").style.width = "150%";
            document.getElementById("centerimg").style.height = "150%";
            document.getElementById("center").style.left = 120+"px";
        } else {
            document.getElementById("centerimg").style.width = "100%";
            document.getElementById("centerimg").style.height = "100%";
            document.getElementById("center").style.left = 190.5+"px";
        }
        (flag)?flag=false:flag=true;
    } 

Answer 1

这和你写的一样:

if(flag){
    flag = false;
}else{
    flag = true;
}