Grid Row Resize
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Grid for React

React version of this topic (compatible with React 19+). Keep the same configuration logic from JavaScript and pass it as component props.

What this topic covers: practical setup, the framework-specific API access pattern, and copy-adapt guidance for the examples in this page.

import React, { useMemo, useRef } from 'react';
import { Grid } from 'smart-webcomponents-react/grid';
import 'smart-webcomponents-react/source/styles/smart.default.css';

export default function App() {
  const componentRef = useRef(null);
  const componentProps = useMemo(() => ({
    // Copy this topic's JavaScript configuration here.
  }), []);

  return <Grid ref={componentRef} {...componentProps}></Grid>;
}

Use componentRef.current for API methods in this topic.

Grid Row Height

By default the Grid displays all rows with a height of 30px. It is defined by the --smart-grid-row-height CSS variable i.e you can change the row height by setting a new value to this variable. It is possible to change the row height by setting the layout.rowHeight property, too.

Example: 
const componentProps = {
    dataSourceSettings: {
        dataFields: [
            { name: 'firstName', dataType: 'string' },
            { name: 'lastName', dataType: 'string' },
            { name: 'productName', map: 'product.name', dataType: 'string' },
            { name: 'quantity', map: 'product.quantity', dataType: 'number' },
            { name: 'price', map: 'product.price', dataType: 'number' },
            { name: 'total', map: 'product.total', dataType: 'number' }
        ]
    },
    behavior: {
        columnResizeMode: 'growAndShrink'
    },
    sorting: {
        enabled: true
    },
    dataSource: [
        {
            firstName: 'Andrew',
            lastName: 'Burke',
            product: {
                name: 'Ice Coffee', price: 10, quantity: 3, total: 30
            }
        },
        {
            firstName: 'Petra',
            lastName: 'Williams',
            product: {
                name: 'Espresso', price: 7, quantity: 5, total: 35
            }
        },
        {
            firstName: 'Anthony',
            lastName: 'Baker',
            product: {
                name: 'Frappucino', price: 6, quantity: 4, total: 24
            }
        }
    ],
    layout: {
        rowHeight: 50
    },
    columns: [
        {
            label: 'First Name', dataField: 'firstName', cellsVerticalAlign: 'center'
        },
        { label: 'Last Name', dataField: 'lastName' },
        { label: 'Product', dataField: 'productName' },
        {
            label: 'Quantity', dataField: 'quantity', cellsAlign: 'right'
        },
        { label: 'Unit Price', dataField: 'price', cellsAlign: 'right', cellsFormat: 'c2' }
    ]
}
grid row height

Custom Row Height

Each row may have a different row height. You can use the row.height property to set a new height to the row. In the following example, we will show how to set a row height, during the row initialization process. 
const componentProps = {
    dataSourceSettings: {
        dataFields: [
            { name: 'firstName', dataType: 'string' },
            { name: 'lastName', dataType: 'string' },
            { name: 'productName', map: 'product.name', dataType: 'string' },
            { name: 'quantity', map: 'product.quantity', dataType: 'number' },
            { name: 'price', map: 'product.price', dataType: 'number' },
            { name: 'total', map: 'product.total', dataType: 'number' }
        ]
    },
    behavior: {
        columnResizeMode: 'growAndShrink'
    },
    sorting: {
        enabled: true
    },
    dataSource: [
        {
            firstName: 'Andrew',
            lastName: 'Burke',
            product: {
                name: 'Ice Coffee', price: 10, quantity: 3, total: 30
            }
        },
        {
            firstName: 'Petra',
            lastName: 'Williams',
            product: {
                name: 'Espresso', price: 7, quantity: 5, total: 35
            }
        },
        {
            firstName: 'Anthony',
            lastName: 'Baker',
            product: {
                name: 'Frappucino', price: 6, quantity: 4, total: 24
            }
        }
    ],
    onRowInit: (index, row) => {
        if (index === 0) {
            row.height = 35;
        }
        else if (index === 1) {
            row.height = 50;
        }
        else if (index === 2) {
            row.height = 80;
        }
        else row.height = 50;
    },
    columns: [
        {
            label: 'First Name', dataField: 'firstName', cellsVerticalAlign: 'center'
        },
        { label: 'Last Name', dataField: 'lastName' },
        { label: 'Product', dataField: 'productName' },
        {
            label: 'Quantity', dataField: 'quantity', cellsAlign: 'right'
        },
        { label: 'Unit Price', dataField: 'price', cellsAlign: 'right', cellsFormat: 'c2' }
    ]
}
grid dynamic row height

Cells Text Wrapping and auto row height

By setting the layout.rowHeight property to 'auto' and layout.allowCellsWrap property to true, the text inside rows will wrap and the rows will auto-resize. 
	layout: {
        allowCellsWrap: true,
        rowHeight: 'auto'
    }

grid wrap row height

Row Resize

To enable row resize, you will need to set the behavior.rowResizeMode to 'growAndShrink' or 'split' and the appearance.showRowHeader property to true.
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Developer Quick Reference

Topic: grid-row-resize   Component: Grid   Framework: React

Main methods: (none detected)

Common config keys: behavior, sorting, dataSource, layout, columns

Implementation Notes

Compatibility: React 19+   API access pattern: const componentRef = useRef(null) + componentRef.current.method()

Lifecycle guidance: Use useMemo for large config objects and call imperative API through componentRef.current after first render.

Common pitfalls:

  • Recreating columns/dataSource objects on every render can reset component state.
  • Calling API methods before ref is available causes runtime errors.
  • Mixing controlled and imperative updates without sync can lead to stale UI.

Validation checklist:

  • Keep config objects memoized when possible.
  • Guard API calls with ref existence checks.
  • Verify CSS theme import is present once per app.