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20200819冯佳丽

学习总结

1.BootStrap文件引入顺序

先引入bootstrap的css文件

Bootstrap 所提供的许多组件都依赖 JavaScript 才能运行。再使用script标签引入js文件。

jQuery 必须排在第一位,然后是 Popper.js,最后是bootstrap的 JavaScript 插件。