ReoGrid Web 1.2.1 Released — Major Formula and Editing Enhancements

UNVELL Inc. released ReoGrid Web 1.2.1, the latest version of its Excel-like spreadsheet library for web applications, on May 15, 2026.

The 1.2.x series, built up since the official launch in March, has pushed the formula and editing experience to a level that genuinely feels like Excel. There are no breaking changes to the public API.

■ What's new in 1.2.1

1.2.1 extends the drag interaction on the formula reference highlights shown on the grid while editing. Drag the dashed border to move a range, or drag a corner grip to resize — matching Excel and our .NET edition.

■ Headline features of the 1.2.x series

Expanded formula library: 109 Excel-compatible built-in functions including VLOOKUP, SUMIFS, and XLOOKUP. Formulas inside imported xlsx files work out of the box.

Excel-like formula reference editing: references are color-coded across an 8-color palette, with matching dashed rectangles drawn on the grid. Click or drag another cell to insert a reference.

Autofill: drag the fill handle at the bottom-right of the selection to extend values — arithmetic progressions, date series, and relative-reference shifting.

React/Vue event props: receive selection, cell-value, scroll, and other events declaratively as props/emits.

Per-side border overrides in conditional formatting and a faster rendering engine (~70% fewer Canvas calls per frame during scroll) are also included.

See the blog post "ReoGrid Web 1.2.1 Released — Major Formula and Editing Enhancements" for details.