How to solve push is not a function error in JavaScript

In this tutorial, we are going to learn about how to solve the TypeError: push is not a function in JavaScript

When we use a Array.push() method on a value which is not an data type array we will get the following error in our console.

Example:

const obj=  {
   a: 1,
   b: 2,
   c: 3
};

obj.push(3);

Output:

"TypeError: obj.push is not a function

In the example above, we are getting the error because we using the push() method on a data type object.

To solve the error, we need to make sure to call the push() method on a data type array.

Here is an example:

const arr = [2, 3, 4];
arr.push(5);

console.log(result);

Output:

[2, 3, 4, 5]

Note: The push() method adds one or more elements at the end of an array.

If you’re getting the error while pushing a objects to an array, try to check object syntax by calling push() method on it.

Here is an example:

const arr = [{name: "raj"}];

arr.push[{name: "sai"}];

We can also check, if the given value is an type array or not before calling the push() method on it. So that, we can avoid the runtime errors.

var arr = [1, 2, 3];

if(Array.isArray(arr)){
    arr.push(4);
}else{
    console.log("Given data is not an array")
}

Conclusion

The “push is not a function” error occurs, when we call a push() method on a value which is not array. To solve the error convert the value to an array before calling the push() method on it or make sure to use push() method on valid arrays.