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tyf-aop

v0.1.2

Published

aop js实现

Downloads

2

Readme

AOP

AOP面向切面编程 - js实现

安装

 npm i tyf-aop

参数说明

target 目标对象

  • 要监听那个对象或者实例化对象

aspect 切面

  • 自定义处理函数
    • 可以是一个promise
    • 允许有返回值
    • 根据通知类型不同,返回值格式也不同
    • after 返回数组 即(arguments)
    • 返回值将自动注入到原始方法中

advice 通知类型

  • after 执行前通知(允许返回值 值为 数组类型)
  • around 环绕通知
  • before 执行后通知
  • afterReturning 执行后返回前通知 (允许返回值 值为 自定义类型)

pointCut 切入点

  • methods 监听 target 所有方法
  • method 监听单个方法,需要在 method中自定义方法名

method 自定义方法

  • pointCut 为 method 时 需要传入

快速开始

class TestClass {
  constructor(public name: string, public age: number) {}
  print() {
    console.log("This name is:" + this.name + " and age: " + this.age);
  }
  sayHi() {
    console.log("🎤");
  }
}
const testClass = new TestClass("张三", 23);
inject(testClass, before, "before", "method", "print");
inject(testClass, after, "after", "method", "print");
inject(testClass, around, "around", "method", "print");
inject(testClass, afterReturning, "afterReturning", "method", "print");

async function before() {
  // await ...
  console.log("method before");
}

function around() {
  console.log("method around");
}

function after() {
  console.log("method after");
}

function afterReturning() {
  console.log("method afterReturning");
}

testClass.print();