What is the function of a text editor in web development?

A text editor plays a crucial role in web development by allowing developers to manually input and edit HTML commands, alongside other coding languages. This tool provides a simple interface where developers can write, modify, and save their code. Text editors come equipped with features like syntax highlighting, which makes it easier to read and debug code, and basic line numbering which helps to navigate through code efficiently. As developers work on web pages, they can use a text editor to structure their HTML, add style with CSS, and incorporate interactivity with JavaScript.

While there are tools available that automate the generation of code, analyze website performance, or aid in visual design creation, the primary function of a text editor is centered around direct coding input and modification. Therefore, the option about manually inputting and editing HTML commands accurately captures the fundamental use of a text editor in the web development process.