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[Solved] How to resolve TypeError: Cannot convert undefined or null to object

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error How to resolve TypeError: Cannot convert undefined or null to object in javascript. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How How to resolve TypeError: Cannot convert undefined or null to object Error Occurs?

Today I get the following error How to resolve TypeError: Cannot convert undefined or null to object in javascript.

How To Solve How to resolve TypeError: Cannot convert undefined or null to object Error ?

  1. How To Solve How to resolve TypeError: Cannot convert undefined or null to object Error ?

    To Solve How to resolve TypeError: Cannot convert undefined or null to object Error I have the same problem with a element in a webform. So what I did to fix it was validate. if(Object === 'null') do something

  2. How to resolve TypeError: Cannot convert undefined or null to object

    To Solve How to resolve TypeError: Cannot convert undefined or null to object Error I have the same problem with a element in a webform. So what I did to fix it was validate. if(Object === 'null') do something

Solution 1

Generic answer

This error is caused when you call a function that expects an Object as its argument, but pass undefined or null instead, like for example

Object.keys(null)
Object.assign(window.UndefinedVariable, {})

As that is usually by mistake, the solution is to check your code and fix the null/undefined condition so that the function either gets a proper Object, or does not get called at all.

Object.keys({'key': 'value'})
if (window.UndefinedVariable) {
    Object.assign(window.UndefinedVariable, {})
}

Answer specific to the code in question

The line if (obj === 'null') { return null;} // null unchanged will not evaluate when given null, only if given the string "null". So if you pass the actual null value to your script, it will be parsed in the Object part of the code. And Object.keys(null) throws the TypeError mentioned. To fix it, use if(obj === null) {return null} – without the qoutes around null.

Solution 2

I have the same problem with a element in a webform. So what I did to fix it was validate. if(Object === ‘null’) do something

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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