// 遍历数组加判断条件后返回新数组
// 遍历数组判断返回新数组 data = state.list.filter(item => item.done === false) //箭头后面return 的是判断条件，为真时，形成新的数组 //{return item.done === false} [ { "id": 0, "info": "Racing car sprays burning fuel into crowd.", "done": true }, { "id": 1, "info": "Japanese princess to wed commoner.", "done": false }, { "id": 2, "info": "Australian walks 100km after outback crash.", "done": true }, { "id": 3, "info": "Man charged over missing wedding girl.", "done": false }, { "id": 4, "info": "Los Angeles battles huge wildfires.", "done": false } ]