Method isNegative

src/AutoNumericHelper.js:500–518

* Return `true` if the given number is negative, or if the given string contains a negative sign : * - everywhere in the string (by default), or * - on the first character only if the `checkEverywhere` parameter is set to `false`. * * Note: `-0` is not a negative number since it'

(numberOrNumericString, negativeSignCharacter = '-', checkEverywhere = true)

     * @returns {boolean}
     */
    static isNegative(numberOrNumericString, negativeSignCharacter = '-', checkEverywhere = true) {
        if (numberOrNumericString === negativeSignCharacter) {
            return true;
        }

        if (numberOrNumericString === '') {
            return false;
        }

        if (AutoNumericHelper.isNumber(numberOrNumericString)) {
            return numberOrNumericString < 0;
        }

        if (checkEverywhere) {
            return this.contains(numberOrNumericString, negativeSignCharacter);
        }

        return this.isNegativeStrict(numberOrNumericString, negativeSignCharacter);
    }

    /**
     * Return `true` if the given string contains a negative sign on the first character (on the far left).