If you are facing issues when trying to select the same image file or any other file from the input field in your React, Angular, or any other framework, here is what you might be doing wrong.
First things first, this is a browser behavior designed to prevent unnecessary events from firing. Once you’ve already selected a file, the browser may consider selecting the same file again unnecessary. However, this default behavior can sometimes be frustrating.
There is nothing wrong with JavaScript or any other framework.
To work around this issue, here is a simple fix:
<input
type="file"
onChange={handleOnChange}
accept="image/png, image/jpg"
/>
<script>
handleOnChange = (event)=>{
const file = event.target.files[0];
//do whatever you want to do with the file
//include this at the end of task
event.target.value = null;
}
</script>
To address this issue, set the value of the input field to ‘null’. This prevents the browser from having a current value to compare with the new one, thereby preventing the event from firing unnecessarily.
Another Approach
Another approach in React is to use the key prop on the input field to force it to remount whenever you need to reset it. This effectively removes the browser’s ability to compare the previous value with the new one because the input field is treated as a new instance.
import React, { useState } from 'react';
function ChangeFileInput() {
const [key, setKey] = useState(0); // Initialize key state
const handleReset = () => {
setKey(Date.now()); // Update key to remount the input field
};
return (
<div>
<input key={key} type="file" />
<button onClick={handleReset}>Reset Input</button>
</div>
);
}
export default ChangeFileInput;