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When is the Scan Credit Card option available on iOS8 Safari?

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情深已故
情深已故 2020-11-29 16:06

So Safari offers Scan Credit Card feature on iOS8 with some credit card forms.

My question is, how does Safari determine when to offer this option?<

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  • 终归单人心
    2020-11-29 16:16

    I've found that something like this works, but I consider this a very ugly solution, since it depends on the actual displayed text between the label tags:

    <html>
  <head>
    <title>AutoFill test</title>
  </head>
  <body>
    <h1>AutoFill test</h1>
    <h2>revision 4</h2>

    <form action="#">
      <input type="text" name="cardNumber" id="id1"> <label for="id1">Number</label><br>
      <input type="text" name="cardName" id="id2"> <label for="id2">Name on card</label><br>
      <label>Expiration date</label>
      <input type="text" name="expirationMonth" id="id3" maxlength="2">
      <input type="text" name="expirationYear" id="id4" maxlength="2"><br>
      <input type="text" name="csc" id="5"> <label for="id5">CSC</label><br>
    </form>
  </body>
</html>

    I am not entirely sure, but I think, that name parameters are not important.

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  • 庸人自扰
    2020-11-29 16:21

    It's not about when, it's about how we can enable this feature in Safari browser.

    Let's just talk about what happens when a form is submitted:

    1. Some browsers stores all input values with it's name attribute. And it will offer to autocomplete those fields when it encounters same named input elements.

    2. Some browsers scan for just autocomplete attribute for offering auto-completion and,

    3. Some others scan for an attribute like label or name for input elements too.

    Now, autocomplete attribute can have a larger set of values including cc-name (Card name), cc-number, cc-exp, cc-csc (Security number - CVV) etc. (full list here)

    For example, we could say to a browser that, this is card number field and it should offer autocomplete when possible and it should enable scan credit card feature as:

    <label>Credit card number: 
  <input type=text autocomplete="cc-number">
</label>

    In general: 

    <input type="text" autocomplete="[section-](optional) [shipping|billing](optional) 
[home|work|mobile|fax|pager](optional) [autofill field name]">

    more detailed ex: 

    <input type="text" name="foo" id="foo" autocomplete="section-red shipping mobile tel">

    And each autocomplete values goes like this: 

    section-red : wrapping as a section. (named red)
shipping : shopping/billing
mobile   : home|work|mobile|fax|pager (For telephone)
tel      : [Tokens][2]

    When we code it like this browser know exactly what kind of value should be populated in that field.

    But browser like safari need name or id or label values should also be set right.

    Support so far for autocomplete, id and name attributes for auto-completing values.

    Browse  Ver OS              ID      Name    Autocomplete
Chrome  50  OS X 10.11.4    No      Yes     Yes
Opera   35  OS X 10.11.4    No      Yes     Yes
Firefox 46  OS X 10.11.4    Yes     Yes     No
Edge    25  Windows 10      No      Yes     No
Safari  9.1 OS X 10.11.4    Partial Partial Partial
Safari  9   iOS  9.3.1      Partial Partial Partial

    There are more things at play here. I strongly recommend this blog I referred.

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  • 礼貌的吻别
    2020-11-29 16:23

    After a bit of research with an iOS8 browser and Chrome emulation I figured it out partially. I know of some solutions, but I don't know for sure if there are other ways to do it. You'll have to thank Apple for the amazing lack of documentation around this.

    Currently Netflix/Amazon have credit card scanning working properly. So I emulated an iOS8 user agent in my Chrome browser and inspected the markup of their credit card number field. Here's Netflix's:

    <input name="cardNumber" smopname="num" id="cardNumber-CC" class="cardNumber" type="text" value="************0891" pattern="[0-9]*">

    And here's Amazon's:

    <input name="addCreditCardNumber" size="20" maxlength="20">

    At that point I played around with a form served over HTTPS that I had control over and started setting attributes to see what would happen. Below, "works" means "successfully triggered card scan" and "doesn't work" means "did not trigger card scan":

    • name="addCreditCardNumber" => works
    • name="cardNumber" => works
    • name="cardnumber" => works
    • class="cardNumber" => does not work
    • type="cardNumber" => does not work
    • id="cardNumber", id="creditCardNumber", id="creditCardMonth", id="creditCardYear" => works

    Since the name attribute drives form data and might impact the way server-side form processing works I highly recommend triggering credit card scan by setting your input id to cardNumber.

    I would link to the relevant documentation...but hey! There's none (at least, not that I know of)

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  • 予麋鹿
    2020-11-29 16:23

    Thanks to @barbazoo, the Scan Credit Card option will be available over https with a valid (not self signed) certificate.

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  • 挽巷
    2020-11-29 16:23

    Even after using the autocomplete and ID methods described above, I had a label at the top of my page with the value Credit / Debit / Gift Card that prevented iOS from offering the Scan CC option. I ended up adding this label above my CC number field to trick iOS into offering the Scan CC option:

    <label style="opacity:0.01;color:#FFF;font-size:2pt;">Card Number</label>

    Opacity of 0, or a font-size of 1pt prevents iOS from offering the option.

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  • 北荒
    2020-11-29 16:29

    I think your better bet is to use HTML5 Autocomplete Types on your inputs.

    Stick to the credit card related types, and most modern browsers will auto recognize these fields for you, including Mobile Safari and the "Scan Credit Card" feature. Bonus is that you'll always get the correct keyboard on mobile devices too.

    Example (note autocomplete, x-autocompletetype, and pattern attributes):

    <input type="text" id="cc-num" autocomplete="cc-number" x-autocompletetype="cc-number" pattern="\d*">

<input type="text" id="cc-name" autocomplete="cc-name" x-autocompletetype="cc-full-name">

    I also wrote a related blog post on this topic and built an HTML5 Autocomplete Cheatsheet.

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