Function _isNumber

external/.datatables.js:1074–1098

(d, decimalPoint, formatted, allowEmpty)

	}

	var _isNumber = function (d, decimalPoint, formatted, allowEmpty) {
		var type = typeof d
		var strType = type === "string"

		if (type === "number" || type === "bigint") {
			return true
		}

		// If empty return immediately so there must be a number if it is a
		// formatted string (this stops the string "k", or "kr", etc being detected
		// as a formatted number for currency
		if (allowEmpty && _empty(d)) {
			return true
		}

		if (decimalPoint && strType) {
			d = _numToDecimal(d, decimalPoint)
		}

		if (formatted && strType) {
			d = d.replace(_re_formatted_numeric, "")
		}

		return !isNaN(parseFloat(d)) && isFinite(d)
	}

	// A string without HTML in it can be considered to be HTML still
	var _isHtml = function (d) {