validateFilename(filename) Last updated: 13. May 2026
Validates that a filename contains only allowed characters.
Parameters
| Name | Type | Description |
|---|---|---|
| filename | string | The filename to check. The function returns true if the filename is valid, or false if it contains illegal characters such as tabs, leading/trailing spaces, or other disallowed characters. |
Returns
True if valid, false if invalid filename.
Example
Code example (JS)
JS is normal JavaScript either running in the browser or on the Docly™ server.let x = "validfile.txt";
let result = docly.validateFilename(x); // will be true
let invalid = " not\t valid";
result = docly.validateFilename(invalid); // will be false