1、请描述控制台输出的数字顺序
console.log(1);
this.$http.get("api/data1").then((x) => {
console.log(2);
this.$http.post("api/data2", x).then(() => {
console.log(3);
});
console.log(4);
});
console.log(5);
答：__ __ __ __ __
2、请描述控制台输出
const source = [1, 2, 3, 4, 5, 6, 7, 8, 9];
const arr1 = source.filter((item) => item % 3 === 2);
const arr2 = arr1.map((item) => item - 2);
console.log(arr2);
答：
3、请描述控制台输出
fun(n: number) {
if (n <= 1) {
return 1;
}
const num = n * this.fun(n - 1);
console.log(num);
return num;
}
fun(4);
答：
4、请描述控制台输出
console.log(1);
this.$http.get("api/data1").then(() => {
console.log(2);
});
const res = await this.$http.get("api/data1").then(() => {
console.log(3);
return 4;
});
console.log(res);
答：
