Add further documentation for skooma.js

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Talia 2022-01-13 22:02:20 +01:00
parent b088905988
commit c9b85b112c
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2 changed files with 141 additions and 2 deletions

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@ -13,7 +13,7 @@ class CodeBlock extends HTMLElement {
let content = this.innerHTML.replace(/^\s*\n/, "").replace(/\n\s*$/, "")
let prefix = new RegExp(`${content.match(/^\t*/)}`, "g")
content = content.replace(prefix, "").replace(/&.*;/g, str => escapes[str] ?? str)
this.replaceChildren(html.pre(html.code(template(hljs.highlightAuto(content).value))))
this.replaceChildren(html.pre(html.code(template(hljs.highlight(content, {language: 'javascript'}).value))))
}
}

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@ -94,7 +94,7 @@
return button
</code-block>
<p>Adding a <strong>shadow-root</strong> to the new element can be done witht he <code>shadowRoot</code> property.</p>
<p>Adding a <strong>shadow-root</strong> to the new element can be done with the magic <code>shadowRoot</code> property.</p>
<p></p>
<code-block>
return html.div({
@ -109,5 +109,144 @@
div.innerText = "Light-DOM text content"
return div
</code-block>
<p>Object can be <strong>styled</strong> inline via the magic <code>style</code> property.</p>
<p>Meanwhile in Vanilla JS styling properties have to be added one by one</p>
<code-block>
return html.div("Hello, World!" {
class: 'button', style: {
color, // some constant
border: '1px solid currentcolor
}
})
</code-block>
<code-block>
let div = document.createElement("div")
div.innerHTML = "Hello, World!"
div.style.color: color // some constant
div.style.border: '1px solid currentcolor'
return div
</code-block>
<p>Custom elements with hyphenated names can be created easily</p>
<p></p>
<code-block>
return html.myComponent()
</code-block>
<code-block>
return document.createElement("my-component")
</code-block>
</div>
</section>
<section>
<h2>The <code>text</code> helper</h2>
<div class="columns">
<p>The <code>text</code> helper provides a convenient wrapper around the
<code>document.createTextNode</code> function</p>
<p>In its simplest form, it's only a shorthand for its vanilla counterpart</p>
<code-block>
return text("Hello, World!")
</code-block>
<code-block>
return document.createTextNode("Hello, World!")
</code-block>
<p>However, you don't need to pass an argument to it.</p>
<p></p>
<code-block>
return text()
</code-block>
<code-block>
return document.createTextNode("")
</code-block>
<p>It also acts as a tag function for template literals, returning a
document fragment containing a list of text nodes.</p>
<p></p>
<code-block>
return text`Hello, ${name}!`
</code-block>
<code-block>
let fragment = new DocumentFragment()
fragment.append("Hello, ")
fragment.append(name)
fragment.append("!")
return fragment
</code-block>
<p>You can even interpolate actual DOM nodes in the string</p>
<p></p>
<code-block>
return text`Hello, ${html.b(name)}!`
</code-block>
<code-block>
let fragment = new DocumentFragment()
fragment.append("Hello, ")
let bold = document.createElement("b")
bold.innerHTML = name
fragment.append(bold)
fragment.append("!")
return fragment
</code-block>
</div>
</section>
<section>
<h2>The <code>bind</code> helper</h2>
<p>
<dl>
<dt>Callback registration function</dt>
<dd>
A function that takes a callback as its single argument and returns
an initial state as an array of elements. The inital state will be
used to generate the bound element for the first time. The callback
function should be called whenever an update in the UI is desired
and the new state should be passed as its argument.
</dd>
<dt>Transform function</dt>
<dd>
A function that takes the initial or updated state and returns a new
HTML element.
<details><summary>Planned feature</summary>
When no HTML element is returned, nothing happens. This can be
used to update the existing element instead; however, the
function currently provides no means to access the old element in
the transform function.
</details>
</dd>
</dl>
</p>
<p>
Imagine <code>counter</code> to be an object with a <code>count</code>
attribute representing the current count and <code>onIncrement</code> to
be a function to register a callback to be called whenever the counter
gets updated.
</p>
<div class="columns">
<h3>Creating a new Element</h3>
<h3>Updating the old Element</h3>
<code-block>
let counterMessage = count =&gt;
text`Current count: ${html.b(count)}`
// onIncrement doesn't return an initial
// state, so we have to wrap it:
let onIncrement = bind(callback =&gt;
counter.onIncrement(callback) || counter.count)
return boundElement = onIncrement(counterMessage)
</code-block>
<code-block>
// Not yet implemented
</code-block>
</div>
<p>
When an element gets replaced with a newer version of itself, any variable
containing the old element will become "stale". For this reason, the
function injects a <code>current</code> property into every element it
creates that will always point to the newest version of the element.
</p>
</section>