Sept. 21, 2023, 11:45 a.m. | Cezary Tomczyk

DEV Community dev.to

Follow these steps.



  1. Go to any page that uses Tailwind.

  2. Open the developer console.

  3. Execute code new Blob([document.documentElement.outerHTML]);. Notice the returned number. It represents approximately the HTML size.

  4. Execute code Array.from(document.getElementsByTagName('*')).forEach((el) => { el.className = ''; }). This removes all CSS classes.

  5. Execute code new Blob([document.documentElement.outerHTML]). The number represents the HTML size after all CSS classes were removed.


Calculate how much (%) the HTML size has increased.

array check code css developer document foreach go to html impacts simple trick

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