函数 lazy

  • lazy(): {
        do(cb: ((done: Function, value: unknown) => void | Promise<any>)): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; };
        wait(ms: number): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; };
    }

  • 一种队列，分支wait和do

    和async、await组合的区别是，lazy支持运行时编程

    返回 {
        do(cb: ((done: Function, value: unknown) => void | Promise<any>)): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; };
        wait(ms: number): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; };
    }

    • do:function
      • do(cb): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; }

      • 参数

        • cb: ((done: Function, value: unknown) => void | Promise<any>)

          回调返回一个值或返回一个promise 供下一个do回调调用

            • (done, value): void | Promise<any>

            • 参数

              • done: Function
              • value: unknown

              返回 void | Promise<any>

        返回 { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; }

    • wait:function
      • wait(ms): { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; }

      • 参数

        • ms: number

          等待毫秒数

        返回 { do(cb: (done: Function, value: unknown) => void | Promise<any>): ...; wait(ms: number): ...; }

    示例

    lazy()
        .wait(10)
        .do(
          () =>
            new Promise(() => {
              // promise不resolve，那么后面的永远不会执行
            }),
        )
        .wait(20)
        .do((done) => {
          // 普通函数需要调用done才会继续
          done();
        });