Utilities

Cell references

• columnToLetter(col)
• letterToColumn(letter)
• encodeCellRef(row, col)
• decodeCellRef(ref)

These helpers convert between zero-based coordinates and Excel references like B4.

Date conversion

• excelDateToJS(serial)
• jsDateToExcel(date)

These helpers convert between Excel serial dates and JavaScript Date values.

Vector helpers

• serializeVector(arr)
• deserializeVector(str)
• isVectorString(str)

These helpers implement the package's numeric vector interchange format.

XML helper

• escapeXml(str)

Escapes special XML characters for text content generation.