核心提示：Question 1var a = 1;function b() { a = 10; return; function a() {}}b();console.log(a);Question 2func...
Question 1
var a = 1;
function b() {
a = 10;
return;
function a() {}
}
b();
console.log(a);
Question 2
function foo(){
function bar() {
return 3;
}
return bar();
function bar() {
return 8;
}
}
alert(foo());
Question 3
function parent() {
var hoisted = "I'm a variable";
function hoisted() {
return "I'm a function";
}
return hoisted();
}
console.log(parent());
Question 4
alert(foo());
function foo() {
var bar = function() {
return 3;
};
return bar();
var bar = function() {
return 8;
};
}
Question 5
var myVar = 'foo';
(function() {
console.log('Original value was: ' + myVar);
var myVar = 'bar';
console.log('New value is: ' + myVar);
})();
答案
输出: 1 输出: 8 输出: “TypeError: hoisted is not a function” 输出: 3 输出: 5
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