Function yyyyMMddFormat

yyyyMMddFormat(
    dateStr: string | number,
): {
    date: Date;
    day: string;
    hour: string;
    millisecond: string;
    minute: string;
    month: string;
    second: string;
    str: string;
    year: string;
    dateStr(): string;
}
格式化格式为 yyyyMMdd 或 yyyyMMddhhmmss 的日期字符串，输出为一个对象
Parameters
- dateStr: string | number
Returns {
    date: Date;
    day: string;
    hour: string;
    millisecond: string;
    minute: string;
    month: string;
    second: string;
    str: string;
    year: string;
    dateStr(): string;
}
Example
```
yyyyMMddFormat('20180101'); {year: '2018', month: '01', day: '01', str: '2018年01月01日', ...}
yyyyMMddFormat(''); // {year: '', month: '', day: '', str: '', ...}
```
- Defined in src/common/date.ts:128