1.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

</body>
<script>
  var obj1 = [
    {
      id: 4399,
      name: '黄忠'
    }, {
      id: 4379,
      name: '吕布'
    }
  ]
  var obj2 = [
    {
      id: 4399,
      wq: '弓箭',
      zq: '黄骠马'
    }, {
      id: 4379,
      wq: '方天画戟',
      zq: '赤兔马'
    }
  ]
  function hb(arr1, arr2) {
     return arr1.map(item => {
       let arr= arr2.find(item1=>{
         return item.id==item1.id
       })
       return{...item,...arr}
    }) 
    
  }
  console.log(obj1,obj2);
  var arr1 = hb(obj1, obj2)
  console.log(arr1);

</script>

</html>