工具提示的最新更新的引导脚本不起作用

我刚刚开始学习引导程序。此文件中没有工具提示。我从getboostrap.com官方网站复制了代码，但仍然无法正常工作。如果缺少任何文件，或者还有其他无法正常工作的文件，请帮助我。

谢谢你。

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