In February 2026, JustdotJS enhanced the PrairieLearn repository by developing pre-filled input fields for mathematical problem interfaces. They introduced an initial-value attribute to text input elements, including matrix and symbolic inputs, enabling default values to appear for students and reducing entry friction. Their approach ensured compatibility with the formula editor, allowing initial values to render as LaTeX when needed. Using Python and front end development skills, JustdotJS addressed rendering and parsing issues, preventing conflicts with placeholders and blank values. They also updated documentation and examples, providing a scalable solution for math contexts and demonstrating thorough attention to integration details.