从json obj中删除警告

Question

这里我附上了json结果。

"properties": {
                "id": 99,
                "county": "Ashe",
                "cen_lat": 36.4343964583676,
                "cen_long": -81.5004915302458,
                "county_id": "5",
                "extent": "[-9099469.85881319,4333729.96758589,-9044051.86962052,4381852.80674575]"
            }

当我读取范围并获得结果时

  

“[ - 9099469.85881319,4333729.96758589，-9044051.86962052,4381852.80674575]”

但我需要

  

[ - 9099469.85881319,4333729.96758589，-9044051.86962052,4381852.80674575]

我怎么才能得到？

Answer 1

如评论中所述。

JSON.parse("[-9099469.85881319,4333729.96758589,-9044051.86962052,4381852.80674575]");