Flexible data tables with CSS Grid is an engineering case study by Adam Lynch detailing how Teamwork CRM implemented responsive, resizable, and data-heavy list views using CSS Grid and native HTML table elements.

The core technical features and design strategies covered in the article include:

• Responsive Multi-Device Layout: Stacks data columns vertically on narrow mobile screens and expands into a full multi-column data table on wider viewports.

• Grid Flattening with display: contents: Applies display: grid to the <table> element and display: contents to <thead>, <tbody>, and <tr> elements. This bypasses wrapper rows, promoting individual <th> and <td> cells to directly participate as grid items in a single unified table grid.

• Data-Type Aware Sizing: Uses grid-template-columns with minmax() and fractional (fr) units (e.g., grid-template-columns: minmax(150px, 1.33fr) minmax(150px, 2.33fr)) to automatically allocate wider max proportions to long text columns compared to compact date columns.

• Smooth Interactive Column Resizing: Listens for mouse events on column handles to recalculate widths via requestAnimationFrame. It updates the grid-template-columns property on the <table> element, avoiding costly DOM updates across every individual table cell.

• Fixed-Width Locking & Persistence: Automatically converts fluid fr columns into fixed pixel measurements as soon as a user manually resizes any column, preventing unpredictable side effects on adjacent columns and saving user preferences in localStorage.

• Architectural Trade-Off Analysis: Evaluates and rejects alternatives—avoiding Flexbox (which spaces rows independently), <colgroup> (too limited for dynamic fluidity), and heavy JS libraries—while advising caution with display: contents due to potential browser accessibility and screen reader bugs.