HTMX gives you HTTP interactions directly in the markup, and it supports many other interactive needs without resorting ... the powerful trio of HTML, JavaScript, and CSS, which continues to ...

It allows you to edit PHP, HTML, CSS and JavaScript files, and it highlights the syntax ... recognition and building of the complete structure of PHP projects—all of these functions ensure easy work ...

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code ... to create scrap projects or files.