![Make <input type="file"> reject dropped file(s) that don't match "accept" attribute · Issue #4216 · whatwg/html · GitHub Make <input type="file"> reject dropped file(s) that don't match "accept" attribute · Issue #4216 · whatwg/html · GitHub](https://user-images.githubusercontent.com/495429/49168712-64396000-f338-11e8-96a5-a5d166427a6c.png)
Make <input type="file"> reject dropped file(s) that don't match "accept" attribute · Issue #4216 · whatwg/html · GitHub
![html - How to make input type= file Should accept only .xlsx and filename contain substring - Stack Overflow html - How to make input type= file Should accept only .xlsx and filename contain substring - Stack Overflow](https://i.stack.imgur.com/WHMQy.png)
html - How to make input type= file Should accept only .xlsx and filename contain substring - Stack Overflow
![android - How to allow <input type=“file”> to accept only image files for image upload - Stack Overflow android - How to allow <input type=“file”> to accept only image files for image upload - Stack Overflow](https://i.stack.imgur.com/YeXKW.png)
android - How to allow <input type=“file”> to accept only image files for image upload - Stack Overflow
![I am unable to upload any pdf files in my jotform, using the file upload widget. Other formats can be uploaded. The only problem is with PDF files. I I am unable to upload any pdf files in my jotform, using the file upload widget. Other formats can be uploaded. The only problem is with PDF files. I](https://cms.jotform.com/uploads/answers/answer/cloudifysandbox/3317313_pdf%20problem.png)
I am unable to upload any pdf files in my jotform, using the file upload widget. Other formats can be uploaded. The only problem is with PDF files. I
![I've written some code for custom validation for file upload and thought I'd share - Custom Coding - Softr Community I've written some code for custom validation for file upload and thought I'd share - Custom Coding - Softr Community](https://community.softr.io/uploads/db9110/original/2X/8/80517c3811e5641c072e99036bb78dfecd3eef9f.png)