JavaScript DataGrids are essential components for data-intensive web applications, offering capabilities far beyond HTML tables: inline editing, sorting, filtering, grouping, virtualization, and custom cell rendering. The guide covers when to use a DataGrid over an HTML table, key feature categories (display, editing, analysis), a step-by-step integration example using Wijmo FlexGrid via npm and ES modules, performance optimization techniques (virtualization, deferUpdate, batching), and specialized grid variants like PivotGrid, TransposedGrid, and MultiRow grids.
Table of contents
Why Use a DataGrid?Key JavaScript DataGrid FeaturesHow to Add a JavaScript DataGridOptimizing JavaScript DataGrid PerformanceSpecialized JavaScript DataGridsConclusionQuestions this post answers
How do I add Wijmo FlexGrid to a JavaScript project using npm and ES modules?
Install @mescius/wijmo.grid and @mescius/wijmo.styles, add a div host element with a fixed height, then import FlexGrid and the CSS. Initialize the grid by passing a selector, column definitions with binding/header/width/format, and an itemsSource array. Binding a plain array causes FlexGrid to create an internal CollectionView that supports editing and sorting automatically. Developers integrating FlexGrid for the first time find setup walkthroughs and library comparisons on daily.dev.
What is the default virtualization threshold in Wijmo FlexGrid and when should I change it?
FlexGrid's default virtualization threshold is 0, meaning virtualization is always enabled regardless of row or column count. Changing the threshold is rarely necessary. For small grids, a slightly higher threshold may improve perceived scrolling, but values above roughly 200 are not recommended because rendering every cell increases loading time and DOM usage. Teams tuning FlexGrid for large datasets track performance tips and release notes on daily.dev.
How do I batch multiple configuration changes in Wijmo FlexGrid to avoid repeated re-renders?
Wrap multiple configuration changes in grid.deferUpdate(() => { ... }). This internally calls beginUpdate and endUpdate, so the grid refreshes only once after all changes complete. It also guarantees updates resume even if the callback throws an exception, making it safer than manually calling beginUpdate and endUpdate. Developers optimizing grid rendering performance share patterns like these on daily.dev.