Problem

I want to select a DOM element by CSS selector on my React-generated web page for debugging purposes. In this case, I am trying to test out CSS selectors to be used in my Capybara acceptance test.

Solution

Use jQuery NO, DON’T DO THAT!

A neat feature of the Chrome Web Inspector is that I can search an entire page by CSS Selector, without needing to litter my code with debugger statements. Just open up the Elements tab and then press CMD-F (on Mac) to open up a search bar. I can now type whatever CSS Selector that I want and view the results that match. I can quickly test different selectors out, so that I can verify that I am writing my Capybara test accurately.

Source