在Typescript中解析iso8601微秒

我创建了自己的班级 PrecisionDate 它存储一个与日期相同的毫秒数,但以微秒计的小数部分。它使用 new Date() 精确到毫秒。然后,我使用regex和capture组来获取微秒。

const ISO8601_REGEX = /^(\d{4})-(0\d|1[0-2])-([0-2]\d|3[0-1])T([01]\d|2[0-4]):([0-5]\d):([0-5]\d)[.,](\d{3})?(\d{3})?(\d+)?\+(\d\d):(\d\d)/;

public static parse(timestamp: string): number {
    // Get the full time except for the microseconds
    let time = Date.parse(timestamp);

    const captureGroups = ISO8601_REGEX.exec(timestamp);
    const microSeconds = captureGroups[ISO8601_REGEX_MICRO];

    if (microSeconds) {
        time += parseInt(microSeconds, 10) / 1000;
    }

    return time;
}