validateFile

Validates a single <input type="file"> field: required/min/max file count, accepted types (accept), max size (maxSizeMB), and - for images - dimension limits. Async, since checking image dimensions requires decoding the file. Returns: Promise<boolean \| ErrorMessageInterface>

Parameter	Type	Required	Default	Description
`fileInputField`	`HTMLInputElement`	`required`	`-`	The file input to validate.
`options`	`any`	`optional`	`-`	File rule overrides: `required`, `accept`, `maxSizeMB`, `minFiles`, `maxFiles`, `maxWidth`, `maxHeight`, `minWidth`, `minHeight`, and their `*Message` variants.

Usage

Example: Validate a file input


const fileElement = document.querySelector('input[type="file"]');
const result = await nfsfu234FormValidation.validateFile(fileElement, { form: myForm });
console.log(result);