函数 getInsKeys

获取class实例的key数组

示例

class UpdateTestSuperClass {
 a = 1;
 b = 2;
 private test() {
   return 'super test';
 }
 fn1() {
   return 'super fn1';
 }
 get len() {
   this.test();
   return 0;
 }
}
class UpdateTestClass extends UpdateTestSuperClass {
  c = 3;
  fn2() {
    return 'sub fn2';
  }
  override get len() {
    return 1;
  }
}

const superKeys = ['a', 'b', 'fn1', 'len', 'test'].sort();
const subKeys = ['c', 'fn2', ...superKeys].sort();

getInsKeys(new UpdateTestSuperClass()).sort(); // superKeys

getInsKeys(new UpdateTestClass()).sort(); // subKeys

// 不会继承method
const obj = { a1: 1, b2: 2, c3: 3, ...new UpdateTestClass() };
getInsKeys(obj).sort(); // ['a', 'b', 'c', 'a1', 'b2', 'c3'].sort()

const obj2 = Object.create(new UpdateTestClass());
getInsKeys(obj2).sort(); // subKeys

const obj3 = Object.create(null);
obj3.a = 1;
obj3.b = 2;
getInsKeys(obj3).sort(); // ['a', 'b']
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