如何缩短开关案例块将数字转换为月份名称？

javascript date date-format switch-statement

2022-08-30 05:30:53

有没有办法在更少的行上写这个，但仍然易于阅读？

var month = '';

switch(mm) {
    case '1':
        month = 'January';
        break;
    case '2':
        month = 'February';
        break;
    case '3':
        month = 'March';
        break;
    case '4':
        month = 'April';
        break;
    case '5':
        month = 'May';
        break;
    case '6':
        month = 'June';
        break;
    case '7':
        month = 'July';
        break;
    case '8':
        month = 'August';
        break;
    case '9':
        month = 'September';
        break;
    case '10':
        month = 'October';
        break;
    case '11':
        month = 'November';
        break;
    case '12':
        month = 'December';
        break;
}

答案 1

定义一个数组，然后按索引获取。

var months = ['January', 'February', ...];

var month = months[mm - 1] || '';

答案 2

那么根本不使用数组呢:)

var objDate = new Date("10/11/2009"),
    locale = "en-us",
    month = objDate.toLocaleString(locale, { month: "long" });

console.log(month);

// or if you want the shorter date: (also possible to use "narrow" for "O"
console.log(objDate.toLocaleString(locale, { month: "short" }));

根据这个答案从David Storey的日期获取月份名称