promise
在 promise 继续执行后立即调用。 这可能在 then()、catch() 或 finally() 句柄之后,或者在另一个 await 之后的 await 之前。
then()
catch()
finally()
await
Called immediately after a promise continuation executes. This may be after a then(), catch(), or finally() handler or before an await after another await.