shady-components
v0.6.0
Published
Simple method for building WebComponents
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Shady-Components lets you to create absurdly simple WebComponents.
First let's create a WebComponent in a file called UpperElement.js:
import ShadyElement from "/node_modules/shady-components/shady.js"
export class UpperElement extends ShadyElement {
get Upper() {
return this.Data.Text.toUpperCase();
}
}
ShadyElement.Register(UpperElement);This registers a WebComponent upper-element with a property that returns the upper-case Data.Text. Now let's define the WebComponent's HTML.
Shady.js automatically requests an HTML file of the same name as the JS file, so in UpperElement.html we write:
<span>${Upper}</span>This will insert the Upper property declared above when the WebComponent renders. The WebComponent upper-element is now complete!
To import it into a web-page, let's create an index.html page as such:
<html>
<head>
<script type="module" src="./UpperElement.js"></script>
</head>
<body>
<div>
<upper-element data-text="Hello, World!"></upper-element>
</div>
</body>
</html>Parameters are passed into the WebComponent via data-* arguments, which are mapped to Data.* properties within the JS.
When we visit index.html we see:
HELLO, WORLD!And that's it!
Check the examples for idea's on what this tech can be used for.
FAQ
What does this work on?
Currently this works with no other steps in Chrome. To make it work on other browsers requires a mix of steps involving translating it with Babel.js to a lower JS level and adding polyfills. An example of this can be found in the example Polyfill Demo.
Are there more examples?
Sure, check out more examples here, with their code in the repo here.
How on earth does it know where the HTML is?!
I'm sorry... please don't judge me.
Until various meta properties are exposed I had to do something slightly dirty. Ready yourself..
It uses stacktrace.js to access the current stack-trace and uses file-information from that to locate itself and the relative files.
I cannot morally do that, can I inline the HTML and CSS?
Sure! Check out the Inline Register example to see how. The basic logic is to use a build-step to append the static members .inlineHTML & inlineCSS which shady.js will then use. Any help adding a guide or tool to gulp to do would be a great help!
Warranty
It's hacky, slow and has terrible edge cases so should only really be used for making fun home projects.
Credits
Currently I (Tom Bonner) have written the basic framework with the hope for more contributors.
The excellent people behind the Polymer Framework are owed credit given they were a major source of inspiration and introduced me to Web Components.