Cannot read property of undefined in Javascript and ReactJs

How to remove Property of undefined error from you Javacript Projects .Cannot read property of undefined in Javascript and ReactJs .

Error like Cannot read property `map` of undefined

Learn more about ReactJs from https://learncoders.xyz/otp-countdown-timer-in-react/

There are certain ways to resolve this issue in your app

function studentRecord(a) {
    console.log(a.b);
}

var stuRec = {
    s: 'Student Record'
};

myFunc(stuRec );

To avoid error Property undefined you can use below method

if (stuRec !== undefined) {
    ...
}

if (typeof(stuRec ) !== 'undefined') {
    ...
}

You can use another way to handle this kind of situation in your project.

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