This morning after I refer to seveal friends for yesterday's problem,I still haven't resolve it:<
Then ,I googled the key words"javascript null....",I saw an article which said unnormal
javascript may produced from change lines.So all of a sudden,I realize that if there is
a problem with my datas of database.When I check it ,it really have a problem-----there
is a line feed between the data of table menu_item
本文描述了作者在遇到JavaScript中出现null的问题时的排查过程。通过求助朋友未能解决问题后,作者利用搜索引擎找到了可能是由于数据库中数据格式不正确导致的问题所在,并最终定位到表menu_item中的数据存在换行符这一具体原因。

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