millify
Version:
Converts long numbers to pretty, human-readable strings
57 lines (56 loc) • 1.81 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getLocales = exports.getFractionDigits = exports.roundTo = exports.parseValue = void 0;
/**
* parseValue ensures the value is a number and within accepted range.
*/
function parseValue(value) {
const val = parseFloat(value === null || value === void 0 ? void 0 : value.toString());
if (isNaN(val)) {
throw new Error(`Input value is not a number`);
}
if (val > Number.MAX_SAFE_INTEGER || val < Number.MIN_SAFE_INTEGER) {
throw new RangeError("Input value is outside of safe integer range");
}
return val;
}
exports.parseValue = parseValue;
/**
* Rounds a number [value] up to a specified [precision].
*/
function roundTo(value, precision) {
if (!Number.isFinite(value)) {
throw new Error("Input value is not a finite number");
}
if (!Number.isInteger(precision) || precision < 0) {
throw new Error("Precision is not a positive integer");
}
if (Number.isInteger(value)) {
return value;
}
return parseFloat(value.toFixed(precision));
}
exports.roundTo = roundTo;
/**
* Returns the number of digits after the decimal.
*/
function getFractionDigits(num) {
var _a;
if (Number.isInteger(num)) {
return 0;
}
const decimalPart = num.toString().split(".")[1];
return (_a = decimalPart === null || decimalPart === void 0 ? void 0 : decimalPart.length) !== null && _a !== void 0 ? _a : 0;
}
exports.getFractionDigits = getFractionDigits;
/**
* Returns the default browser locales.
*/
function getLocales() {
var _a;
if (typeof navigator === "undefined") {
return [];
}
return Array.from((_a = navigator.languages) !== null && _a !== void 0 ? _a : []);
}
exports.getLocales = getLocales;