JavaScript 数组查找：获取 is_selected 为 1 的 _id

js查找数组中is_selected==1的_id内容：可以使用filter方法来查找数组中is_selected等于1的元素，然后获取对应的_id值。

const data = [
  {fl_name: "全天房费率", is_selected: 0, _id: "3yb2pa0hfkxf"},
  {fl_name: "半天房费率", is_selected: 1, _id: "3yb2pa0hfkxd"}
];

const selectedId = data.filter(item => item.is_selected === 1)[0]._id;
console.log(selectedId);

输出结果:

3yb2pa0hfkxd