How to mock a React component in a jest unit test. Example of how to mock a default or named component using React Testing Library.

Examples of how to use within in Jest and React Testing Library to target a specific section of the component. Restrict Jest queries to a particular element. Inside the context of a DOM node.

Using React MUI DatePicker dynamically lazy load date-fns locale files for localization. Reduce page size, speed up load time. Full working example and how to solution. Import locale files from date-fns.

Solution to using WordPress shortcodes in Gatsby. Replace WordPress shortcode with React Component in Gatsby simply. No MDX needed.

Tutorial for headless WordPress Gravity Forms with Gatsby Frontend. Step by step guide to rendering forms as React Components and handling submissions.

Updating React Material UI Core causes error: 'Failed prop type: The prop `disableBackdropClick` of `ForwardRef(Dialog)` is deprecated' - SOLVED! With example.

Solution for adding media.net ad script to React website. Provides a React component for showing media.net adverts. Simple example of how to add script to a website.

Solution to YouTube videos/iframes negatively effecting website load speed. Use Intersection Observer API To Lazy Load. React component included in article.

How to unit test a React parent component logic, and check that a child component is passed the correct props. Test if a component is called with expected argument using React Testing Library.

Helper function to measure the execution time of code in JS and add X seconds to delay. Time asynchronous function and sleep code for specific time, including await time.