用jq在js里加数据

    <script src="1.js"></script>
    
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.js"></script>
    <script>
        let ace ={
            age:20
        }
        let obj={
            name:"www",
            gender:"20",
            sayHi(){
               console.log("Hi");
               
           }

        }
        sun.extend(obj,ace)
        sun.extend({
            sayHello(){console.log("hello");
            }
        })
        console.log(ace);
        sun.sayHello()
        
    </script>

js里的

extend(a,b){
        b=b||this
        for (let key in a) {
          b[key] = a[key]
        }
    }

直接调用sayHello（）