Solve - some is not a function in JavaScript

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

When we use a Array.some() 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.some(el => el < 10 );

Output:

"TypeError: obj.some is not a function

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

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

Here is an example:

const arr = [2, 3, 4];

const result = arr.some(el=> el < 10);
console.log(result); //Output -> True

Note: The sum() returns true, if any of the element in the array passes the test condition, otherwise it returns false.

If you’re getting the error when working with a HTML collection then convert the HMTL collection to a array before calling the some() method on it.

const elements = document.getElementsByClassName("container");

[...elements].some(el => el.style.color === "red");

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

var arr = [1, 2, 3];

if(Array.isArray(arr)){
    arr.some(el => el < 10);
}else{
    console.log("Given data is not an array")
}

Conclusion

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