Niuke JS separator

Cattle from JS Separator ( Digit thousand separator ）

describe

Please complete it JavaScript Code , The thousand separator string of the parameter number is required to be returned .

Example

Input ：_comma(12300)
Output ：‘12,300’

Input ：_comma(-123456789)
Output ：-123,456,789

function _comma(number) {
    
    let resArr = []
    let count = 0
    //  Whether the mark is negative 
    let flag = false
    //  Dealing with negative numbers 
    if(number < 0){
    
        number = Math.abs(number)
        flag = true
    }
    //  Deal with numbers after the decimal point 
    const parts = number.toString().split('.')
    number = parts[0]
    const afterPoint = '.' + parts[1] || ''
    while(number >= 1){
    
        const current = number % 10
        resArr.unshift(String(current))
        count++
        number = Math.floor(number / 10)
        if(count % 3 === 0 && number >= 1){
    
            resArr.unshift(',')
        }
        
    }
    console.log(resArr,afterPoint)
    return (flag ? '-' : '') + resArr.join('') + afterPoint
}

console.log(_comma(1546546.4688))