版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/textfit/2.4.0/textFit.js
- https://cdn.bootcdn.net/ajax/libs/textfit/2.4.0/textFit.min.js
A fast, jQuery-free text sizing component that quickly fits single and multi-line text to the width (and optionally height) of its container.