Small method for copy and paste

Get the current date or format the current date method encapsulation yyyy-MM-dd

Convert the date format of the current time, yyyy/MM/dd, yyyy.MM.dd, and yyyy-MM-dd as separators to yyyy-MM-dd

1. Determine whether there is a value passed in, and if there is no value passed in, get the current time

2. Whether the value is passed in to judge whether it is a date format (here is not completely judged whether the day and month are correct, only a preliminary judgment is made)

3. Convert date format

function dateFormat(oldDate){
    const re = /^(\d{4})(\/|\.|-)(\d{1,2})(\/|\.|-)(\d{1,2})$/
    if(!oldDate){
        oldDate = new Date().toLocaleDateString()
    }else if(!re.test(oldDate)){
        console.log('日期格式有误')
        return
    }
    const date = new Date(oldDate)
    let year = date.getFullYear().toString()
    let month = (date.getMonth() + 1).toString()
    let day = date.getDate().toString()
    month = month.padStart(2, '0')
    day = day.padStart(2, '0')
    const dataFormat = `${year}-${month}-${day}`
    return dataFormat
}

Input Content Restrictions

export function limitInput(input){
    if(!input){
        return ''
    }
    const reg = new RegExp("[^0-9a-z-A-Z]") // 只能输入数字和英文
    let reflowSpecial = ''
    for(let i = 0; i < input.length; i++){
        reflowSpecial = reflowSpecial + input.substr(i, 1).replace(reg, '')
    }
    return reflowSpecial
}