Column Auto Fit

ReportSheet support column auto fit when generating report, you need to set the autoFit property as 'Column' for the cell that you want to auto fit the column width.

Open the demo in new window can open the designer The auto fit types are as follows: None Row Column You can use the following code to set the auto fit for the cell.
window.onload = async () => { const loadingTip = addLoadingTip(); const { spread, designer } = createSpreadAndDesigner(); const res = await fetch('$DEMOROOT$/en/sample/features/report-sheet/auto-fit/column-auto-fit/spread.json'); await spread.fromJSON(await res.json()); loadingTip.remove(); if (designer) { designer.refresh(); } } function createSpreadAndDesigner() { const demoHost = document.getElementById('demo-host'); if (window !== top) { return { spread: new GC.Spread.Sheets.Workbook(demoHost, { sheetCount: 1 }), } } else { const designer = new GC.Spread.Sheets.Designer.Designer(demoHost, undefined, undefined, { sheetCount: 1 }); return { designer, spread: designer.getWorkbook(), } } } function addLoadingTip() { const div = document.createElement('div'); div.style.position = 'absolute'; div.style.inset = '0'; div.style.display = 'flex'; div.style.alignItems = 'center'; div.style.justifyContent = 'center'; div.style.background = 'white'; div.style.zIndex = '100'; div.textContent = 'Loading data from server ...'; document.body.appendChild(div); return div; }
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