javascript - Jquery如何使用多个where子句查询Json对象

Question

如何从 json 对象查询多个列/属性？ 我正在尝试this查询单列“类别”。如何同时查询Category和Id？

var data = {
  "items": [{
    "id": 1,
    "category": ["cat1","cat2"]
  }, {
    "id": 2,
    "category": ["cat1","cat3"]
  }, {
    "id": 3,
    "category": ["cat11","cat2"]
  }]
};

var returnedData = $.grep(data.items, function (element) {    
  return element.category.indexOf('cat1') >= 0;
});

console.log(returnedData);

Answer 1

不要使用较慢的 grep，而是使用普通的 js filter

var data = {
  "items": [{
    "id": 1,
    "category": ["cat1","cat2"]
  }, {
    "id": 2,
    "category": ["cat1","cat3"]
  }, {
    "id": 3,
    "category": ["cat11","cat2"]
  }]
};

const res = data.items.filter(e => e.category.indexOf('cat1') >= 0 && e.id === 1);
console.log(res);