CryptoJS.HmacSHA256 Cannot read properties of undefined (reading 'sigBytes')


It looks like you are trying to use the sigBytes property of an object that is undefined. This error is likely occurring because the object that you are trying to access the sigBytes property of is null or undefined.

To fix this error, you will need to make sure that the object is defined before trying to access its properties. Here are a few possible ways to do this:

  1. Check for null or undefined before accessing the property:
if (myObject && myObject.sigBytes) {
  // myObject is defined and has a sigBytes property, so it's safe to use
} else {
  // myObject is either null or undefined, so we can't access its properties
  console.log('myObject is null or undefined')
  1. Use the || operator to provide a default value if the object is null or undefined:
const sigBytes = (myObject && myObject.sigBytes) || 'default value'
  1. Use the optional chaining operator (?.) to safely access the property only if the object is defined:
const sigBytes = myObject?.sigBytes

I hope this helps! Let me know if you have any other questions.