Having trouble displaying the :before element on a ReactiveForms input

Is anyone else experiencing difficulty displaying a FormControl on a form to hold a telephone country code prefix with a plus sign always visible in the left-padding area? I attempted to use a :before element on the input, but even after inspecting in DevTools, I couldn't get it to appear. In my desperation, I tried applying the :before element to all inputs, yet still no luck. Interestingly, the styles for the main input element are functioning as expected.

The same issue is present when using :after.

My question is - has anyone successfully used a :before or :after element in this scenario? Is this a known limitation of ReactiveForms or potentially a bug?

css

input[name="telCountryCode"]:before {
  content: '+';
  display: inline-block;
  position: absolute;
  top: 0;
  left: 0;
  width: 1rem;
  height: 1rem;
}

ts

this.form = this.fb.group({
  telCountryCode: '',
  telNumber: '',
});

Answer №1

One limitation to keep in mind is that pseudo elements such as :before and :after do not have any effect on the INPUT tag.

Answer №2

Surround the input with a div element

<div class="telCountryCode-wrapper">
<input type="text"  name="telCountryCode">
</div>

Then, apply the following CSS

.telCountryCode-wrapper{
position:relative;
}
.telCountryCode-wrapper:before{
 content: '+';
  display: inline-block;
  position: absolute;
  top: 0;
  left: 0;
  width: 1rem;
  height: 1rem;
}

Answer №3

Pseudo-elements like :before/:after can only be rendered inside a container

Using pseudo-elements like :before/:after is not permitted for elements like input, as well as for img, br, hr, and others.

This rule does not apply to self-closing elements.

Answer №4

Pseudo-elements are limited to being defined on container elements because they are rendered within the container itself as a child element.

Input elements cannot contain other elements, which is why pseudo-elements are not supported.

For more information, check out this resource about using :after pseudo-element on an input field

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