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@chialab/dna
Advanced tools
DNA • Progressive Web Components
DNA aims to unleash the true power of Custom Elements through a declarative definition API, with builtin elements extension support and a simpler composition mechanism (yes, it does not use ShadowDOM).
DNA simplifies and encourages the use of customized built-in elements, which inherit methods and properties from standard HTML, preserving usability and accessibility features.
DNA offers @property
and @state
decorators for adding reactivity to a component's class fields, ensuring that any changes are reflected in the component's template. These properties and states can be monitored, synchronized with attributes, and trigger change events.
DNA uses event delegation for listening to events from a component's elements or slotted contents, offering the @listen
decorator to streamline the process. Events can be asynchronous and dispatched from the component's class.
DNA uses Quantum instead of ShadowDOM to render slotted children, simplifying the usage of custom elements inside forms and providing a more flexible management of slotted contents. Unlike ShadowDOM, Quantum also works for built-in elements, allowing you to use even inside buttons.
Install via NPM:
npm i @chialab/dna
yarn add @chialab/dna
import { Component, customElement, listen, property } from '@chialab/dna';
@customElement('hello-world')
class HelloWorld extends Component {
// define an observed property
@property() name: string = '';
render() {
return (
<>
<input
name="firstName"
value={this.name}
/>
<h1>Hello {this.name || 'World'}!</h1>
</>
);
}
// delegate an event
@listen('change', 'input[name="firstName"]')
private onChange(event: Event, target: HTMLInputElement) {
this.name = target.value;
}
}
Then use the element in your HTML:
<hello-world></hello-world>
Install the dependencies and run the build
script:
yarn install
yarn build
This will generate the bundles in the dist
folder, as well as the declaration files.
Run the test
script:
yarn test
DNA is released under the MIT license.
4.2.1
$parse
directive.FAQs
Progressive Web Components
The npm package @chialab/dna receives a total of 225 weekly downloads. As such, @chialab/dna popularity was classified as not popular.
We found that @chialab/dna demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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