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Add kebab<->camel case conversion to component state

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Talia 2024-01-10 15:23:10 +01:00
parent 451718cb74
commit f199f64932
1 changed files with 12 additions and 6 deletions
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18
state.js
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@ -1,5 +1,8 @@
export const abortRegistry = new FinalizationRegistry(controller => controller.abort()) export const abortRegistry = new FinalizationRegistry(controller => controller.abort())
const camelToKebab = string => string.replace(/([a-z])([A-Z])/g, (_, a, b) => `${a}-${b.toLowerCase()}`)
const kebabToCamel = string => string.replace(/([a-z])-([a-z])/g, (_, a, b) => a+b.toUpperCase())
export class ChangeEvent extends Event { export class ChangeEvent extends Event {
#final #final
constructor(...changes) { constructor(...changes) {
@ -250,22 +253,25 @@ const attributeObserver = new MutationObserver(mutations => {
for (const {type, target, attributeName: name} of mutations) { for (const {type, target, attributeName: name} of mutations) {
if (type == "attributes") { if (type == "attributes") {
const next = target.getAttribute(name) const next = target.getAttribute(name)
if (String(target.state.proxy[name]) !== next) const camelName = kebabToCamel(name)
target.state.proxy[name] = next console.log(camelName)
if (String(target.state.proxy[camelName]) !== next)
target.state.proxy[camelName] = next
} }
} }
}) })
export const component = (generator, name) => { export const component = (generator, name) => {
name = name ?? generator.name.replace(/([a-z])([A-Z])/g, (_, a, b) => `${a}-${b.toLowerCase()}`) name = name ?? camelToKebab(generator.name)
const Element = class extends HTMLElement{ const Element = class extends HTMLElement{
constructor() { constructor() {
super() super()
this.state = new State(Object.fromEntries([...this.attributes].map(attribute => [attribute.name, attribute.value]))) this.state = new State(Object.fromEntries([...this.attributes].map(attribute => [kebabToCamel(attribute.name), attribute.value])))
this.state.addEventListener("change", event => { this.state.addEventListener("change", event => {
for (const [name, value] of event.changes) { for (const [name, value] of event.changes) {
if (this.getAttribute(name) !== String(value)) const kebabName = camelToKebab(name)
this.setAttribute(name, value) if (this.getAttribute(kebabName) !== String(value))
this.setAttribute(kebabName, value)
} }
}) })
attributeObserver.observe(this, {attributes: true}) attributeObserver.observe(this, {attributes: true})