JavaScript 对象 : What am i doing wrong here?

Question

var WEIGHT_KEY= 'weight';

var person{
  name: 'Ryan'
  WEIGHT_KEY: 350
  };

var weight = person;WEIGHT_KEY

Answer 1

应该是这样的:

  var WEIGHT_KEY= 'weight';

  var person = { name: 'Ryan' };
  person[WEIGHT_KEY] = 350;

  var weight = person[WEIGHT_KEY];

JavaScript 对象的行为类似于属性包，因此您可以像索引器一样使用属性名称来获取和设置。