// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/excel/42-range/style.yaml
await Excel.run(async (context) => {
let worksheet = context.workbook.worksheets.getItem("Sample");
let range = worksheet.getRange("A1:E1");
// Apply new style.
range.style = ("Diagonal Orientation Style");
range.format.verticalAlignment = "Justify";
await context.sync();
});