小编use*_*714的帖子

const someObj  = {
      super: {
        exist: true
      },
      photo: {
        exist: true
      },
      request: {
        exist: false
      }
}
const newObj = Object.entries(someObj).reduce((newObj, [key, val]) => {
  if (this.key.exist) { // how to check "exist" is true ?
    return { ...newObj, [key]: val }
  }
}, {}))

console.log(newObj);