踩坑记：01

• 在try中return Promise.reject()不会触发catch，await Promise.reject()会
• createHashRouter的basename会被拼到 hash 而不是 path 中
• try...catch...finally中finally的return会覆盖前两者的return或throw，即使前两者执行了return或throw，finally块也会执行。

以下代码中无论入参是true还是false函数始终返回1

function testFx(isErr: boolean) {
  try {
    console.log("try block is called");
    if (!isErr) return 100;
    throw new Error();
  } catch {
    console.log("catch block is called");
    return 1000;
  } finally {
    console.log("finally block is called");
    return 1;
  }
}
testFx(false);
/**
 * try block is called
 * finally block is called
 * returns 1
 */
testFx(true);
/**
 * try block is called
 * catch block is called
 * finally block is called
 * returns 1
 */

• 函数内部若依赖于一些外部变量，那么函数提升可能会带来一些问题

testFx();// ReferenceError：Cannot access 'a' before initialization
const a = "xxxx";
function testFx() {
  console.log("a", a);
}