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Copyright ©2023 Tonio Loewald
In general, xinjs strives to work with the browser rather than trying to replace it.
In a similar vein, xinjs-ui comprises a collection of web-components
with the goal of augmenting what already works well, and the components are intended be interoperable as
similar as possible to things that you already use, such as <input> or <select> elements.
E.g. where appropriate, the value of an element is its malleable state, and when this changes,
the element emits a change event.
Similarly, the xinjs base Component class and the components in this collection strive to
be as similar in operation as possible to DOM elements as makes sense. E.g. binary attributes
work as expected. Adding the hidden attribute makes them disappear. If a component subclass
has a value property then it will be rendered if the value changes (similarly it will be
rendered if an initialized attribute is changed). Intinsic properties of components will
default to null rather than undefined.
Similarly, because web-components are highly interoperable, there's no reason to reinvent
wheels. In particular, this library won't try to replace existing, excellent libraries
such as shoelace.style or wrap perfectly functional HTML
elements, like the venerable <input> or <form> elements that are already capable
and accessible.
The goal here is to provide useful components and other utilities that add to what's built
into HTML5 and CSS3 and to make custom-elements work as much as possible like drop-in replacements
for an <input> or <textarea> (while mitigating the historical pathologies of things like
<select> and <input type="radio">). E.g. the <xin-select> does not suffer from a
race-condition between having its value set and being given an <option> with the intended value
and you can differentiate between the user picking a value (action) and the value changing (change).
The simplest way to use these elements is to simply import the element and then either
use HTML or the ElementCreator function exported.
E.g. to use the markdown viewer:
import { markdownViewer } from 'xinjs-ui'
document.body.append(markdownViewer('# hello world\nthis is a test'))
const { markdownViewer } = xinjsui
preview.append(
markdownViewer(`
## hello world
here is some markdown
`)
)Assuming you import the module somewhere, the HTML will work as well.
<xin-md>
## hello world
here is some markdown
</xin-md>
The big difference with using the markdownViewer() function is that the xinjs Component
class will automatically pick a new tag if the expected tag is taken (e.g. by a previously
defined custom-element from another library). markdownViewer() will create an element of
the correct type.
The other thing is that xinjs ElementCreator functions are convenient and composable,
allowing you to build DOM elements with less code than pretty much any other option, including
JSX, TSX, or HTML.