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JSON.parse(JSON.stringify(data))

将后端传入的JSON数据data放入该方法的参数中，返回的结果就是JavaScript对象

比如将后端传入的对象key作为对象，而不是字符串双引号格式

        {"path": "/home","name": "home","label": "首页信息","icon": "s-home","url": "Home.vue","children": null},{"path": "/mall","name": "mall","label": "商品管理","icon": "video-play","url": "Mall.vue","children": null},

 就可以使用该方法来转为JS的对象来使用