replaceWithExp.js

// 运用正则去掉空格
' s123s'.replace(/^(\s*)(.+)(\s*)$/, '$2')

// 日期操作
const dataPattern = (str, format = '-') => {
    if (!str) {
        return new Date()
    }
    const dateReg = new RegExp(`^(\\d{2})${format}(\\d{2})${format}(\\d{4})$`)
    const [, month, day, year] = dateReg.exec(str)
    return new Date(`${month}, ${day} ${year}`)
} 

console.log(dataPattern('12-25-1995')) // Mon Dec 25 1995 00:00:00 GMT+0800 (中国标准时间)