TableAsArrayOfObjects.ts

function main(workbook: ExcelScript.Workbook): TableData[] {
  const table = workbook.getWorksheet('PlainTable').getTables()[0];
  // If you know the table name, you can also do this...
  // const table = workbook.getTable('Table13436');
  const texts = table.getRange().getTexts();
  let returnObjects: TableData[] = [];
  if (table.getRowCount() > 0)  {
    returnObjects = returnObjectFromValues(texts);
  } 
  console.log(JSON.stringify(returnObjects));  
  return returnObjects
}

function returnObjectFromValues(values: string[][]): TableData[] {
  let objArray = [];
  let objKeys: string[] = [];
  for (let i = 0; i < values.length; i++) {
    if (i === 0) {
      objKeys = values[i]
      continue;
    }
    let obj = {}
    for (let j = 0; j < values[i].length; j++) {
      obj[objKeys[j]] = values[i][j]
    }
    objArray.push(obj);
  }
  return objArray as TableData[];
}

interface BasicObj {
  [key: string]: string
}

interface TableData {
  "Event ID": string
  Date: string
  Location: string
  Capacity: string
  Speakers: string
}