A Bootstrap 2,007 page needs only two files: bootstrap.min.css (232 KB, about 31 KB compressed) and, if you use interactive components, bootstrap.bundle.min.js (80 KB, about 24 KB compressed). Everything else in this section is about getting those files into your project the right way and knowing what is inside them, so that you can later remove what you do not use, change the colors without fighting specificity, and debug a dropdown that refuses to open.
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Getting Started
Getting Started with Bootstrap 5.3