Sometimes, we want to determine if user selected a file for file upload with JavaScript.
In this article, we’ll look at how to determine if user selected a file for file upload with JavaScript.
How to determine if user selected a file for file upload with JavaScript?
To determine if user selected a file for file upload with JavaScript, we check if the value property is not an empty string.
For instance, we write
if (document.getElementById("uploadBox").value !== "") {
// ...
}
to select the file input with getElementById.
And if its value isn’t an empty string, then a file is selected.
Conclusion
To determine if user selected a file for file upload with JavaScript, we check if the value property is not an empty string.
