Developer Builds Personal Metrics Dashboard Using Only Vanilla JS and CSS Grid
A software developer created a lightweight personal metrics dashboard contained entirely within a single HTML file, using vanilla JavaScript, CSS Grid, and localStorage — with no frameworks or build tools. Frustrated by the complexity of Notion dashboards, SaaS tools, and unfinished React projects, the developer imposed strict constraints to keep the build simple and maintainable. The dashboard tracks five daily metric categories: sleep, training, deep work, reading input, and biomarkers such as heart rate variability. Data attributes replace traditional IDs for cleaner namespacing, while CSS Grid handles the multi-panel layout without any utility class libraries. The project prioritizes readability and long-term maintainability over feature richness, relying entirely on native browser capabilities.
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