温故而知新 通过chrome tool 查看是否产生闭包

function foo() {
    var a = 20
    var b = 30

    function bar() {
        debugger;
        return a + b
    }

    return bar;
}

var bar = foo();
bar();

 

 

转载于:https://www.cnblogs.com/CyLee/p/9077778.html