Function round

src/util/number.ts:222–237

(x: number | string, precision: number, returnStr?: boolean)

export function round(x: number | string, precision: number, returnStr: false): number;
export function round(x: number | string, precision: number, returnStr: true): string;
export function round(x: number | string, precision: number, returnStr?: boolean): string | number {
    if (__DEV__) {
        // NOTICE: We should not provided a default precision, since there is no universally adaptable
        // precision. The caller need to input a precision according to the scenarios.
        zrUtil.assert(precision != null);
    }
    if (isNaN(precision)) {
        // precision utils (such as getAcceptableTickPrecision) may return NaN.
        return returnStr ? '' + x : +x;
    }
    // Avoid range error
    precision = mathMin(mathMax(0, precision), TO_FIXED_SUPPORTED_PRECISION_MAX);
    // PENDING: 1.005.toFixed(2) is '1.00' rather than '1.01'
    x = (+x).toFixed(precision);
    return (returnStr ? x : +x);
}

export function roundLegacy(x: number | string, precision?: number): number;
export function roundLegacy(x: number | string, precision: number, returnStr: false): number;