How to inspect your WordPress webpages code in your browser ?

Browser dev tools

source :

Many CSS ( stylesheet) questions on the support forums (such as Nimble Builder support forum) are easy to address using the development tool of your favorite browser and the WordPress Custom CSS panel. You can also add custom CSS to a specific page of your WordPress site with the free Nimble Builder plugin.

This documentation helps you get started with your browser's development tool. If you are not familiar with CSS customization, this guide will interest you.

Javascript issue ? If you need to explore a javascript problem on your website, has an article about using the browsers console log to diagnose JavaScript errors.

Browsers development tools

The browser development tools allow you to access many useful inspection features like real-time CSS customization, or the  javascript debug console. The video below demonstrate how to customize the background of Google home page using the color picker in Chrome. Simply hit F12 on your keyboard and you'll access this interface.
Chrome color picker
The following tools are generally launched by hitting F12 on your keyboard :
  • Recommended Chrome DevTools
  • Firefox Firebug
  • Safari has Web Inspector (which you switch on in the menu with Safari > Preferences > Advanced > Show Develop menu in menu bar). Simply right-click and select “Inspect Element” to launch it.
  • F12 developer tools in Internet Explorer
For every element on your page, it quickly and easily shows you which CSS rules (and files) are responsible for the styling.
You can work out in seconds how to change the styling of any element. Simply right-click it and select Inspect Element with Firebug.

Once you get more confident with it, you’ll find some really great features that take you to another level

Useful tutorials

More online resources

If you prefer reading text to watching a video, here are some really great articles on that go into more detail on how to use developer tools / Firebug (the principles are the same for all tools):
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