Classes 04. Length Limit

class Stringer {
    constructor(string, length) {
        this.innerString = string;
        this.innerLength = Number(length);
    }
    increase(length) {
        this.innerLength += length;
    }
    decrease(length) {
        this.innerLength = Math.max(this.innerLength - length, 0);
    }
    toString() {
        if (this.innerString.length > this.innerLength) {
            return `${this.innerString.substring(0, this.innerLength)}...`;
        } else if (this.innerString.length <= this.innerLength) {
            return this.innerString;
        } else {
            return `...`;
        }
    }
}