Javascript twitter bootsrap typeahead不起作用

我做错了什么

在控制台中尝试了这个，但是typeahead不起作用。没有错误

→ $("#to_folder_name").typeahead({"source": DS.folders_names_array})
← [<input type=​"text" data-provide=​"typeahead" id=​"to_folder_name" size=​"15" placeholder=​"Move to..."]


→ DS.folders_names_array
← ["hhhhhhh", "dddssss", "Root", "Default", "Archive", "Custom", "1A", "after SaveExistingLocation_Test", "Hanny", "ggggg", "ggg123", "new folder", "new folder2", "dddddd", "new folder4", "ggg"]

→ $("#to_folder_name")
← [<input type=​"text" data-provide=​"typeahead" id=​"to_folder_name" size=​"15" placeholder=​"Move to...">​]

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包含typeahead.js。

在.typeahead之后删除源代码中的引号？

在typehead.js脚本之前是否包含jQuery？