vue项目菜单栏左侧展开，浏览器报错Invalid prop: type check failed for prop "index". Expected String with value "125", got Number with value 125.

菜单栏左侧展开，浏览器报错Invalid prop: type check failed for prop "index". Expected String with value "125", got Number with value 125.

是因为 index只能接受字符串， :index="item.id" 改成字符串形式 就可以：:index="item.id+''

ok 啦