Property name/value does not exist on type ‘EventTarget & (HTMLInputElement | HTMLSelectElement)’

Property name/value does not exist on type ‘EventTarget & (HTMLInputElement | HTMLSelectElement)’

If you are working with TypeScript and encounter the error message “Property name/value does not exist on type ‘EventTarget & (HTMLInputElement | HTMLSelectElement)’,” you are not alone. This error often occurs when you try to access properties or values on an HTML input element or select element, but TypeScript is unable to infer the correct type. In this blog post, we will explore a couple of solutions to resolve this issue.

Solution 1: Type Assertion

One way to address this error is by using type assertion to explicitly tell TypeScript the type of the element you are working with. This can be done by using the ‘as‘ keyword followed by the desired type.

// Assuming you have an input element with id 'myInput'
const inputElement = document.getElementById('myInput') as HTMLInputElement;
console.log(inputElement.value); // Accessing the value property

By asserting the type as ‘HTMLInputElement‘, TypeScript will now recognize the ‘value’ property and the error should be resolved.

Solution 2: Type Narrowing

Another approach is to use type narrowing to let TypeScript know the specific type of the element. This can be achieved by performing a type check using the ‘instanceof‘ operator.

// Assuming you have an event target 'target'
if (target instanceof HTMLInputElement) {
    console.log(target.value); // Accessing the value property
}

By checking if the target is an instance of ‘HTMLInputElement‘, TypeScript will narrow down the type and allow you to access the ‘value’ property without any errors.

Conclusion

Encountering the error message “Property name/value does not exist on type ‘EventTarget & (HTMLInputElement | HTMLSelectElement)’” is a common issue when working with TypeScript and HTML input/select elements. By using type assertion or type narrowing, you can resolve this error and access the desired properties or values without any issues.

We hope this blog post has provided you with the necessary solutions to overcome this problem. If you have any further questions or suggestions, feel free to leave a comment below.