What if you could check/preview your CSS changes before you push your changes to your site? You can with Charles proxy. Check out the video below from Learnable.com.
First enable local mapping. Under “Tools” > “Map Local”.
![Charles enable map local](/img/lDoMgu_kYm-320.png)
Charles enable map local
Then select the CSS file you want to override with your local copy.
![Charles CSS mapping](/img/TvZsnI5mKp-320.png)
Too easy. When you next refresh your browser you will see the changes you made to your CSS. You now have a great way to double-check your changes before go live.
Have a good explore around all the features of Charles, it’s a great tool to have in your toolbox.