Client-side Testing

Client‑side testing runs in the user's browser by changing the page after it loads. It is ideal for copy, layout, colors, and other visual updates because they do not need back‑end work. The tradeoff is that poorly-timed scripts can cause a brief flash (revealing the original variant) before changes appear, so careful setup matters. These lead to A/B tests that are quick to build and great for trying ideas fast. Example: Swap a headline and button color on your home page and measure clicks on the main call to action.