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I am working on an input field for credit card numbers and I want to customize the behavior of the default placeholder. Instead of a regular placeholder, I want to implement a specific pattern: "xxxx-xxxx-xxxx-xxxx". The goal is for users to only be able to replace the x's with actual numbers while keeping the rest of the pattern intact (each maintaining its own color).

While I came across a post suggesting the use of mask and jQuery for this purpose, I would prefer a solution that combines HTML, CSS, and Angular.

For visual reference, here is an illustration: https://i.sstatic.net/H5HXU.png

javascripthtmlcssangular

Answer №1

To achieve the desired functionality, you will need to utilize an input mask. While HTML does not natively support this feature, there are numerous libraries and discussions on platforms like Stackoverflow that can assist you.

The challenge lies in finding a high-quality input mask that:

  • supports copy & paste and autocomplete functionalities
  • works seamlessly with number-optimized on-screen keyboards
  • does not disrupt the number sequence if a character is corrected in the middle
  • is compatible with assistive technologies relied upon by users with disabilities

This explains why the most effective credit card input mechanisms in web applications typically avoid using input masks.

Instead, they often follow these key principles for implementation:

  • Breaking down the original input into separate inputs and static text placeholders
  • Removing styling from the inputs themselves
  • Grouping everything within an element styled to resemble an input field
  • Styling text to ensure alignment between static and input text flow
  • Implementing significant JavaScript to mimic single-input behavior

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