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Some HCMO Five attributes are super useful for file validation. …You can tell a browser to accept only certain files by using the accept …attribute and passing it some MIME types. So what is a MIME type? …MIME stands for Multipurpose Internet Mail Extensions. …It started out as a format for allowing email attachments in the SNTP protocol, …but it has grown way beyond that and is used heavily all over the web. …And MIME specification starts out with a main type like image or video, followed …by a sub type like JPG or PNG. The accept attribute normally prevents a …browser from choosing files that don't meet our criteria.…
So let's see how that works. Here's a form that's asking the user to …upload a file. So I'm going to hit this choose file button. …Here I have a bunch of files with different types. …So notice that I can choose any of the types that I want. …I'm going to hit cancel, and I'll go into the code for this page, and in the file …input type, I'm going to add an except attribute. …
- Understanding forms
- Adding required fields and placeholders
- Accepting multiple entries
- Limiting uploads
- Handling focus changes
- Validating with regular expressions
- Working with older browsers
- Building jQuery validation
- Using server-side validation
- Sanitizing form input
- Uploading files
- Sending form data to a database
Skill Level Intermediate
1. Getting Started
2. Validating with HTML5
4. jQuery Form Validation
Understanding jQuery3m 47s
5. Working with PHP
6. Processing Form Data
Next steps1m 17s
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