This code leverages different ways to select cells using the Office API.

Selecting Ranges.EXCEL.yaml

name: Selecting Ranges
description: This code leverages different ways to select cells using the Office API.
host: EXCEL
api_set: {}
script:
  content: |
    $("#run1").click(() => tryCatch(workingWithRanges));

    async function workingWithRanges() {
      await Excel.run(async (context) => {

        // define the sheet
        const sheet = context.workbook.worksheets.getActiveWorksheet();

        // Grab a range using Get range
        sheet.getRange("A1:C7").select();

        // Grab a range using Get range
        sheet.getRange("myNewRange").select();

        // Grab a range using Indexes, remember it is 0-based
        sheet.getRangeByIndexes(0,0,7,3).select();

        // Grab the used range
        sheet.getUsedRange().select();

        // Grab the used range
        sheet.getUsedRangeOrNullObject().select();

        // Grab the entire worksheet range
        sheet.getRange().select();

        // Define a multi range
        let multiRange = sheet.getRanges('A1:A5, B1:B5');
        multiRange.load('cellCount');

        // Grab a range using Get range
        let myRange = sheet.getRange("A1:C7");
          
          // Get the entire columns
          myRange.getEntireColumn().select();

          // Get the entrie Rows
          myRange.getEntireRow().select();

          // Get Columns After, positive outside the range, negative inside the range
          myRange.getColumnsAfter(-2).select();

          // Get Rows Below
          myRange.getRowsBelow(-1).select();

          // Get Rows Above
          myRange.getRowsAbove(-1).select();
          
          // Get the last Cell
          myRange.getLastCell().select();

          // Get the last row
          myRange.getLastRow().select();

          // Get the last Column
          myRange.getLastColumn().select();

          // Get a specific row, remember 0-based
          myRange.getRow(1).select();

          // Get a specific column, remember 0-based
          myRange.getColumn(0).select();

          // Get Offset Range
          myRange.getOffsetRange(1,1).select();

          // Get Resized Range
          myRange.getResizedRange(2, 3).select();

          // Get the intersection, takes a second range as an argument.
          myRange.getIntersection('C7:E11').select();

          // Get a specific cell in that range.
          myRange.getCell(2,1).select();

          // Get resized range, I like to think the inner one but it's not exact.
          myRange.getAbsoluteResizedRange(2,2).select();

          // Get bounded range, it's like creating a new rectangle.
          myRange.getBoundingRect("E13:E15").select();


        await context.sync();

        console.log(multiRange.cellCount);



      });
    }

    /** Default helper for invoking an action and handling errors. */
    async function tryCatch(callback) {
      try {
        await callback();
      } catch (error) {
        // Note: In a production add-in, you'd want to notify the user through your add-in's UI.
        console.error(error);
      }
    }
  language: typescript
template:
  content: |-
    <button id="run1" class="ms-Button">
        <span class="ms-Button-label">Run</span>
    </button>
  language: html
style:
  content: |-
    section.samples {
        margin-top: 20px;
    }

    section.samples .ms-Button, section.setup .ms-Button {
        display: block;
        margin-bottom: 5px;
        margin-left: 20px;
        min-width: 80px;
    }
  language: css
libraries: |
  https://appsforoffice.microsoft.com/lib/1/hosted/office.js
  @types/office-js

  [email protected]/dist/css/fabric.min.css
  [email protected]/dist/css/fabric.components.min.css

  [email protected]/client/core.min.js
  @types/core-js

  @microsoft/[email protected]/dist/office.helpers.min.js
  @microsoft/[email protected]/dist/office.helpers.d.ts

  [email protected]
  @types/[email protected]