I am currently making a form with Conditional Fields and Contact Form 7 on Word Press and I have been using this tester to test my code. This tester automatically makes number select boxes have increment and decrement arrows but using the same code in WordPress does not result in increment/decrement arrows. Here is what the arrows look like in the tester:

I have tried looking for a plugin that has increment/decrement arrows but I can only find range sliders, which is not what I want. Does anyone know of any WordPress plugins that do this?