datetimes/src/expressions/MonthExpression.js

Extend class of Date

function MonthExpression(dateRx, date, language) {
    Expresion.call(this, dateRx, date, language);

    this.oneDigit = oneDigit;
    this.twoDigit = twoDigit;
    this.threeDigit = threeDigit;
    this.fourDigit = fourDigit;
    this.otherDigit = null;

    function oneDigit(input) {
        return input.replace(this.dateRx, (this.date.getMonth() + 1).toString());
    }

    function twoDigit(input) {
        return input.replace(this.dateRx, (this.date.getMonth() + 1).toString().padStart(2, '0'));
    }

    function threeDigit(input) {
        return input.replace(this.dateRx, this.language.months[this.date.getMonth()].substr(0, 3));
    }

    function fourDigit(input) {
        return input.replace(this.dateRx, this.language.months[this.date.getMonth()]);
    }
}