MaskedTextBox CSS Styling

Smart.MaskedTextBox is a text input that uses a mask to distinguish between proper and improper user input.

Required files

Smart.MaskedTextBox requires the following scripts to be referenced on a page in order for the custom element to be successfully registered and to work correctly:

  • smart.element.js — this is the base file that defines the common architecture of all Smart custom elements. It is part of the repository ni-kismet/smart-element.
  • smart.textbox.js — this file defines the functionality of the Smart.TextBox custom element. Smart.MaskedTextBox inherits Smart.TextBox custom element.
  • smart.maskedtextbox.js — this file defines the functionality of the Smart.MaskedTextBox custom element.

Smart.MaskedTextBox also requires the following style sheet in order to be displayed correctly.

  • smart.base.css — the base style sheet file.

Initialization

To initialize (instantiate) a Smart.MaskedTextBox custom element, insert the following tag in an HTML page:

<smart-masked-text-box></smart-masked-text-box>

To set properties of the custom element initially, do so by setting the respective attributes of the tag, e.g.:

<smart-masked-text-box mask="####"></smart-masked-text-box>

Getting and setting properties dynamically

Before accessing the custom element’s API in JavaScript, the custom element’s instance has to be retrieved:

let customElement = document.querySelector('smart-masked-text-box');

Properties are represented as members of the custom element’s instance object and can be accessed as such.

Here is an example showing how to get a property dynamically:

let mask = customElement.mask;

Here is an example showing how to set a property dynamically:

customElement.mask = '###-###';

Calling methods

Before accessing the custom element’s API in JavaScript, the custom element’s instance has to be retrieved:

let customElement = document.querySelector('smart-masked-text-box');

Methods are represented as members of the custom element’s instance object and can be accessed as such.

Here is an example showing how to call a method:

customElement.focus();

Styling (CSS API)

Smart HTML Elements use a pair of css files – smart.base.css and smart.[theme name].css. The base stylesheet creates the styles related to the element’s layout like margin, padding, border-width, position. The second CSS file applies the HTML Element’s colors, fonts, borders and backgrounds. The smart.base.css should be included before the second CSS file.

CSS selectors

The following CSS selectors can be used to style Smart.MaskedTextBox:

  • smart-masked-text-box – the element itself. Can be used to set width and height for the whole element.
    • .smart-container – the container that holds all of the internals of the element. Shoudn’t be used for styling.
    • .smart-label – an HTML Span element used to hold the label above the element.
    • INPUT element – an HTML Input element of type “password” used for the user input.
    • .smart-hint – an HTML Span element used to hold the hint below the element.

CSS variables

Smart.MaskedTextBox uses the following CSS variables:

  • –smart-text-box-default-width – used to set the default width of the element. Default value is 200px.
  • –smart-text-box-default-height – used to set the default height of the element. Default value is 30px.