How Can I Style Specific Parts of an Input Field\'s Value?

Styling Specific Portions of an Input Value

Regarding the styling of specific portions of an input field's value, it's worth noting that styles intrinsically apply to an element in its entirety. However, achieving the desired effect necessitates a creative approach to adhere to semantic markup constraints.

Solution Overview

The solution involves dividing the input field based on the user's editing point into three sections:

1. Text before the editing point
2. Editable text at the editing point
3. Text after the editing point

Dynamic Element Manipulation

As the editing point can shift, JavaScript becomes necessary for a dynamic solution. Initially, replace the input element with a container element styled to mimic an input field. Then, use JavaScript to wrap the three sections mentioned above in separate elements (e.g., spans) and apply the desired colors accordingly.

Generated Markup

The following HTML structure could serve as a starting point for the dynamically generated replacement markup:

<div class="input">
  <span class="nonEdited before">foo</span>
  <span class="edited">fizz</span>
  <span class="nonEdited after">bar</span>
</div>

Event Handling

Finally, click, keydown, and keyup events can be utilized to identify the three divisions and wrap them appropriately. This ensures that the styling reflects the user's input dynamically.

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