如何从 json 获取带有动态变量的对象值

Question

我想从 JSON 中获取对象字段的值。我有一个动态变量let check_permission_key = 'ratingscalename';和一个 JSON

let overwrite_key = {
  studentimage: 'student',
  ratingscalename: 'rating-scale-name',
  ratingscale: 'rating-scale-name',
  capturesettingset: 'capture-setting-set',
  capturesetting: 'capture-setting-set',
  eventlog: 'event-log',
  goalcategorie: 'goal-category',
  userimage: 'user',
  datasheetlink: 'datasheet',
  datasheetgoal: 'datasheet',
};

let get_value = overwrite_key.check_permission_key;

所以我正在像这样获取数据，但它不起作用，有人可以帮我解决这个问题吗？

Answer 1

要使用变量访问对象属性值，请使用Bracket ([]) notation：

let overwrite_key = {'studentimage':'student','ratingscalename':'rating-scale-name','ratingscale':'rating-scale-name','capturesettingset':'capture-setting-set','capturesetting':'capture-setting-set','eventlog':'event-log','goalcategorie':'goal-category','userimage':'user','datasheetlink':'datasheet','datasheetgoal':'datasheet'};
let check_permission_key = 'ratingscalename';
let get_value = overwrite_key[check_permission_key];
console.log(get_value);