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Accepting multiple entries

From: Validating and Processing Forms with JavaScript and PHP

Video: Accepting multiple entries

You probably already know that adding the keyword multiple and select fields lets users choose from a list of multiple options, but that's not the only place you can use that. In HTML five this works for the email and for the file input fields as well. So, let's take a look at how that works. Here's a form that asks the user for a name, an email address, and to upload a file. If I try to type two email addresses here, and I try to submit this field, it's going to give me an error because it doesn't see two different emails as a valid email address. Also, if I click right here to choose a file, I'm going to go to the desktop. I can only choose one file at a time.

Accepting multiple entries

You probably already know that adding the keyword multiple and select fields lets users choose from a list of multiple options, but that's not the only place you can use that. In HTML five this works for the email and for the file input fields as well. So, let's take a look at how that works. Here's a form that asks the user for a name, an email address, and to upload a file. If I try to type two email addresses here, and I try to submit this field, it's going to give me an error because it doesn't see two different emails as a valid email address. Also, if I click right here to choose a file, I'm going to go to the desktop. I can only choose one file at a time.

Even if I hold down my multiple file keyboard shortcuts like Command on a Mac or Control on a PC. So, let's go into the code for this, right here. I'm going to add the keyword multiple, into the Input Type email field. I'm going to say Save, and I'll go back into my form. I'll refresh it and I'll try typing two emails now. And now it takes it just fine. So, we can also do that with files. So, I'm going to add that keyword to the file Input Type, and I'll hit Save, and I'll refresh, but before I do that, make sure you take a look right here. Right now, it says Choose Files.

And when I refresh, it's going to say, choose files, plural. So, if I click on that, I'll switch over the desktop where I have a bunch of files, and I'll hold down the Command key on a Mac, or Control on a PC, and I can choose multiple files. Now, you still have to add file handling to your form processor, but this is a nice addition to newer browsers. As usual, make sure you check caniuse.com to see support in older browsers. So, the multiple keyword is really more useful for file handling. We'll take a look at some other file options in the next movie.

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  1. 3m 36s
    1. Welcome
      1m 9s
    2. What you should know
      1m 2s
    3. Using the exercise files
      1m 25s
  2. 12m 50s
    1. Understanding forms
      2m 2s
    2. Working with form fields
      7m 4s
    3. Using the form tag
      3m 44s
  3. 19m 23s
    1. Using input validation
      2m 10s
    2. Adding required fields and placeholders
      1m 31s
    3. Constraining numeric and date fields
      2m 32s
    4. Accepting multiple entries
      1m 41s
    5. Limiting uploads by MIME types
      2m 35s
    6. Assisting text input with a datalist
      1m 55s
    7. Constraining with regular expression patterns
      6m 59s
  4. 42m 13s
    1. Accessing forms
      3m 57s
    2. Looking up form elements
      3m 35s
    3. Handling focus changes
      2m 47s
    4. Detecting the onchange event
      4m 31s
    5. Using the selectedIndex property
      2m 30s
    6. Dynamic validation with regular expressions
      7m 0s
    7. Creating a generic input validation function
      4m 31s
    8. Validating in older browsers with Modernizr
      7m 32s
    9. Interrupting form submission with onsubmit
      5m 50s
  5. 15m 20s
    1. Understanding jQuery
      3m 47s
    2. Validating on submit with jQuery
      3m 45s
    3. Building interactive jQuery validation
      2m 34s
    4. Using the jQuery Validation plugin
      5m 14s
  6. 32m 57s
    1. Communicating with PHP servers
      2m 27s
    2. Retrieving data from superglobals
      8m 18s
    3. Using server-side validation
      4m 59s
    4. Adding in-page validation
      5m 22s
    5. Mirroring input data back to the user
      7m 46s
    6. Sanitizing form input
      4m 5s
  7. 43m 29s
    1. Mailing form data
      8m 28s
    2. Understanding file uploads
      3m 1s
    3. Uploading files
      9m 20s
    4. Processing form data with AJAX
      8m 14s
    5. Preparing your database
      5m 50s
    6. Pushing data
      8m 36s
  8. 1m 17s
    1. Next steps
      1m 17s

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