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Setting the Value of a File Input
Dynamically altering the value of a file input element () raises security concerns as it could allow malicious actors to steal files from the user's computer by setting the value to a specific file path.
Security Restrictions
For this reason, browsers have implemented security measures to prevent the programmatic setting of file input values.
Alternative Solutions
To address the need for multiple file uploads, alternative solutions have emerged:
Modern Solutions
Today, modern browsers support the dynamic setting of file input values using JavaScript. For details and a demo, refer to the question and answer: "How to set file input value programatically (i.e.: when drag-dropping files)?"
Third-Party Solutions
If browser compatibility is a concern, consider using third-party JavaScript libraries such as Plupload:
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