Parses a string as an xsd:decimal lexical form and returns it as a branded Decimal.

This function validates the input against the XML Schema xsd:decimal lexical space after applying the XML Schema whiteSpace="collapse" normalization step. It returns the normalized string without any further canonicalization.

const price = parseDecimal("12.50");

const price = parseDecimal(" 12.50 ");
console.assert(price === "12.50");

try {
  parseDecimal("1e3");
} catch (error) {
  console.assert(error instanceof TypeError);
}