modify the css styling of a polymer component

Question

modify the css styling of a polymer component

I have implemented the paper-input element with a pattern and an error message.

<paper-input label="Horas" name="hours" auto-validate required pattern="([0]:[0-5][0-9])|([1-9]|[1][0-9]|2[0-3])(:[0-5][0-9])?" error-message="Invalid hour format"></paper-input>

When an incorrect hour is entered in the paper-input, the error message is displayed in red. This error message is utilized by paper-input-container/error and is styled in red.

I aim to modify the color of the paper-input. Although changing it directly in the HTML works, I prefer to have the CSS styling in a separate CSS file, such as

custom-style-paper-input-error.html

and

custom-style-paper-input-container.html

.

The goal is to override the CSS of the paper-input component with my custom styles: css-custom.

css polymer

Answer 1

Answer №1

Incorporate the following code into your

custom-style-paper-input-error.html

: Create a style[is=custom-style] element and include the following:

:root {
  --paper-input-container-invalid-color: purple;
}

If you wish for this style to be applied to all paper-inputs, utilize the code above. Alternatively, you can explore using shared-styles.

Answer 2

Incorporate the following code into your

custom-style-paper-input-error.html

: Create a style[is=custom-style] element and include the following:

:root {
  --paper-input-container-invalid-color: purple;
}

If you wish for this style to be applied to all paper-inputs, utilize the code above. Alternatively, you can explore using shared-styles.

Answer 3

Answer №2

If you want to properly style the error container, the recommended method is to utilize the Polymer Styling variable found in the paper-input-container element. The list of these variables can be accessed on its documentation page.

<style>
  :host {
    --paper-input-container-invalid-color: #ff0000;
  }
</style>

To make this style external, you should create a style module as defined by Polymer, and include your style there. Here's an example:

<!-- custom-style-paper-input-error.html -->
<dom-module id="custom-style-paper-input-error">
  <template>
    <style>
      :host {
        --paper-input-container-invalid-color: #ff0000;
      }
    </style> 
  </template>
</dom-module>

Then, when you want to apply it, use an HTML import to bring in that file like you would for any other Polymer element, and then "include" it in the style of your element like so:

<style include="custom-style-paper-input-error"></style>

Feel free to change the name as needed, as long as it corresponds to the id of the dom-module in your external file.

Answer 4

If you want to properly style the error container, the recommended method is to utilize the Polymer Styling variable found in the paper-input-container element. The list of these variables can be accessed on its documentation page.

<style>
  :host {
    --paper-input-container-invalid-color: #ff0000;
  }
</style>

To make this style external, you should create a style module as defined by Polymer, and include your style there. Here's an example:

<!-- custom-style-paper-input-error.html -->
<dom-module id="custom-style-paper-input-error">
  <template>
    <style>
      :host {
        --paper-input-container-invalid-color: #ff0000;
      }
    </style> 
  </template>
</dom-module>

Then, when you want to apply it, use an HTML import to bring in that file like you would for any other Polymer element, and then "include" it in the style of your element like so:

<style include="custom-style-paper-input-error"></style>

Feel free to change the name as needed, as long as it corresponds to the id of the dom-module in your external file.

modify the css styling of a polymer component

Answer №1

Answer №2

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