I encountered an error in the console stating that it cannot read the property tostring() in JavaScript

Having trouble with an error message: "cannot read tostring()". I've included my code below for reference:


function convertRounding(nValue) {
    var sArr = nValue.toString("0.00000").split('.');
    **var sVal = sArr[1].toString();**
    if (sVal == "00000" || sVal.substring(1) == "0000" || sVal.substring(2) == "000")
        return parseFloat(nValue).toFixed(2);
    else if (sVal.substring(3) == "00")
        return parseFloat(nValue).toFixed(3);
    else if (sVal.substring(4) == "0")
        return parseFloat(nValue).toFixed(4);
    else
        return parseFloat(nValue).toFixed(5);
}
javascript

Answer №1

The variable you are using (nValue) lacks a decimal point, causing the split function to fail.

Before attempting to split, ensure that your input is suitable for this operation.

function roundNumber(nValue) {

    var numArray = nValue.toString().split('.');
    var decVal = numArray[1].toString();
    if (decVal == "00000" || decVal.substring(1) == "0000" || decVal.substring(2) == "000")
        return parseFloat(nValue).toFixed(2);
    else if (decVal.substring(3) == "00")
        return parseFloat(nValue).toFixed(3);
    else if (decVal.substring(4) == "0")
        return parseFloat(nValue).toFixed(4);
    else
        return parseFloat(nValue).toFixed(5);
}

console.log(roundNumber(100.20));
//console.log(convertRounding(100)); // fails

https://jsfiddle.net/qgafbvot/2/

Updated to correctly handle numeric inputs.

Answer №2

It seems like there might be an issue with the radix nValue.toString("0.00000"). You should consider using nValue.toString() instead.

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