Fix - splice is not a function in JavaScript

In this tutorial, we are going to learn about how to fix the splice is not a function error in JavaScript.

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

Example:

const obj =  {name: "raj", place: "italy"};

obj.splice(1, 0);

Output:

"TypeError: obj.splice is not a function

In the example above, we are using the splice() method to remove the properties from a object. So, we are getting the the runtime error because the splice() method is only available for arrays but not for objects.

To fix the error, we can use the delete keyword on a object to remove the properties from it.

Here is an example:

const obj =  {name: "raj", place: "italy"};

delete obj.name; // it removes the property `name`

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

const arr = [2, 3, 4];

if(Array.isArray(arr)){
    arr.splice(0, 1);
}