前言
本文搜集的题目,均来自各大网课、面试题等
预编译相关
1
a = 100;
function demo(e) {
function e() { }
arguments[0] = 2;
console.log(e);
if(a){
var b = 123;
function c() {
}
}
var c;
a = 10;
var a;
console.log(b);
f = 123;
console.log(c);
console.log(a);
}
var a;
demo(1);
console.log(a);
console.log(f);
2
function bar(){
return foo;
foo = 100;
function foo() {}
var foo = 111;
}
console.log(bar());
console.log(bar());
function bar() {
foo = 10;
function foo() {}
var foo = 11;
return foo;
}
类型转化相关
if (typeof (a) && -true + (-undefined) + "") {
document.write("基础扎实");
}
if(11 + "11" * 2 == 33){
document.write("基础扎实");
}
!!" " + !!"" - !!false || document.write('你觉得能打印,你就是猪');
暂时未知类型
(window.x || (window.x = "bar"));
console.log(window.x);
function a() {
console.log('a');
}(); //报错
function a(a, b, c, d) {
console.log(a + b + c + d);
}(1, 2, 3, 4);//不报错,但是不执行