Advanced string to number converter!

stringToNumber.js

/**
===DESCRIPTION===
This is a function that converts all sorts of string numbers to the Number type.
It can detect the decimal point automatically, so you don't have to worry about multiple points in your number!

Notice:
This is not meant to be used for normal text like "hello, how is it going?",
It's probably going to crash if you do so.

======USAGE======
Input: String
Output: Number

Input examples:
123.345.234,2 => 123345234.2
485,342,56.14 => 48534256.14
1000,35 => 1000.35
2467.467 => 2467.467
*/

const stringToNumberConverter = (input) => {
    /**@type {[{type:"number"|"point", value:String}]} */
    const firstArray = []
    /** @type {false|"."|","}*/
    var detectedSplitPoint = false
    /** @type {false|"."|","}*/
    var detectedDecimalPoint = false

    var amountOfPoints = 0
    const pointArray = []

    //first cycle
    input.split("").forEach((n) => {
        if (["0","1","2","3","4","5","6","7","8","9"].includes(n)){
            firstArray.push({
                type:"number",
                value:n
            })
        }else if (n == "." || n == ","){
            firstArray.push({
                type:"point",
                value:n
            })
            amountOfPoints++
            pointArray.push(n)
        }
    })

    /**@type {[{type:"number"|"splitpoint"|"decimalpoint", value:String}]} */
    const secondArray = []

    //second cycle
    if (amountOfPoints == 0){
        firstArray.forEach((n) => {
            if (n.type == "number") return secondArray.push({type:"number",value:n.value})
        })
    }else if (amountOfPoints == 1){
        firstArray.forEach((n) => {
            if (n.type == "number") return secondArray.push({type:"number",value:n.value})
            if (n.type == "point"){
                detectedDecimalPoint = n.value
                secondArray.push({type:"decimalpoint",value:n})
            }
        })


    }else if (amountOfPoints > 1){
        if (pointArray[0] != pointArray[pointArray.length-1]){
            detectedDecimalPoint = pointArray[pointArray.length-1]
            detectedSplitPoint = pointArray[0]
        }else {
            detectedSplitPoint = pointArray[0]
        }


        firstArray.forEach((n) => {
            if (n.type == "number") return secondArray.push({type:"number",value:n.value})
            if (n.value == detectedSplitPoint) return secondArray.push({type:"splitpoint",value:n.value})
            if (n.value == detectedDecimalPoint) return secondArray.push({type:"decimalpoint",value:n.value})
        })
    }

    var numberString = ""

    secondArray.forEach((n) => {
        if (n.type == "number"){
            numberString = numberString+n.value
        }else if (n.type == "splitpoint"){
            //do nothing with split points
            return
        }else if (n.type == "decimalpoint"){
            numberString = numberString+"."
        }
    })

    return Number(numberString)
}