update
This commit is contained in:
+59
-10
@@ -7,7 +7,7 @@ Bloatless-React is a very minimal and flexible alternative to React.
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- Supports reactivity through States
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- Supports JSX for components
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- Written in TypeScript
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- Really minimal (under 200 lines)
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- Really minimal (under 300 lines)
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- No bloated server or compiler required - just bundle the JavaScript into a static .html file
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# Setup
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@@ -70,7 +70,7 @@ summary.subscribe(console.log);
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## ListStates
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A ListState\<T\> is a State whose value is a Set\<T\>. A ListState allows specific subscriptions to detect when items get added and removed. This allows dynamic lists to run efficiently.
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A `ListState<T>` is a State whose value is a `Set<T>`. A ListState allows specific subscriptions to detect when items get added and removed. This allows dynamic lists to run efficiently.
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```TypeScript
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// Import
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@@ -78,7 +78,7 @@ import * as React from 'bloatless-react';
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// Define Item type
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class Item implements React.Identifiable {
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uuid = new React.UUID();
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id = React.UUID();
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constructor(public text: string) {}
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}
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@@ -99,6 +99,17 @@ listState.add(newItem);
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listState.remove(newItem);
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```
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## Persistence
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States can persist through reloads via LocalStorage. To implement this, modify your code like this:
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```diff
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-const myState = new React.State("hello");
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+const myState = React.restoreState("my-state", "hello");
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-const myListState = new React.ListState<Item>();
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+const myListState = React.restoreListState<Item>("my-list-state");
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```
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# UI
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For a minimalist stylesheet, I'd recommend checking out my project called [carbon-mini](https://github.com/marlon-erler/carbon-mini/).
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@@ -107,28 +118,38 @@ Bloatless React provides a modified polyfill for the React API. This means that
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## Handling Events
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The `on:<event>` directive adds an EventListener
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The `on:<event>` directive adds an EventListener. This directive also supports the `on:enter` event.
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```TypeScript
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<input on:enter={someFunction}></input>
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<button on:click={someFunction}>Click me</button>
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```
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## Changing Properties
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The `subscribe:<property>` directive subscribes to a State and changes the element's property. The property will be changed through the DOM API, so you can use innerText and innerHTML. You can not use this to set attributes.
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The `subscribe:<property>` directive subscribes to a State and changes a property of the element. Use this for properties available via the DOM model (ie. innerText, innerHTML).
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```TypeScript
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const name = new React.State("John Doe");
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<span subscribe:innerText={name}></span>
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```
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## Setting Attributes
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The `set:<attribute>` directive subscribes to a State and changes an attribute of the element.
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```TypeScript
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<span set:someAttribute={attributeValue}></span>
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```
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## Toggling Attributes
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The `toggle:<attribute>` directive toggles attributes on the HTML element without assigning a value. This is useful for the `disabled` attribute.
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The `toggle:<attribute>` directive toggles attributes on the HTML element without assigning a value. This is useful for the `disabled` attribute. You can use states or normal variables.
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```TypeScript
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const isDisabled = new React.State(false);
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<button toggle:disabled={isDisabled}>Some button</button>
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<button toggle:disabled={false}>Some button</button>
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```
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## Binding Input Values
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@@ -151,14 +172,16 @@ import * as React from 'bloatless-react';
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// Define Item
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class Item implements React.Identifiable {
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uuid = new React.UUID();
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id = React.UUID();
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constructor(public text: string) {}
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}
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// This ListItemConverter creates an HTML element based on an Item
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const convertItem: React.ListItemConverter<Item> = (item, listState) => {
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const convertItem: React.ListItemConverter<Item> = (item) => {
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function remove() {
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listState.remove(item);
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// you should keep track of your data in a separate model
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// keep your removeListItem() method there
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myDataModel.removeListItem(item);
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}
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return (
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<span>
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@@ -204,4 +227,30 @@ document.body.append(
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- Improve documentation
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## 1.1.3
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- Add `on:enter` directive
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- Add `on:enter` directive
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## 1.2.0
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**BREAKING CHANGES**
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- Replace UUID class with function;
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- `new UUID()` => `UUID() returns string`
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- Replace definition of `Identifiable`
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- now has `id: string` instead of `uuid: UUID()`
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Other changes:
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- Add State persistence
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- Add error description when utilizing `subscribe:children` incorrectly
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- Fix bug where ListState subscriptions were not called
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- Improve documentation
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## 1.2.1
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- Add `set:<attribute>` directive
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## 1.2.2
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- Remove list parameter from `ListItemConverter`
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- Add `clear()` method to `ListState`
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## 1.2.3
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- Allow `toggle:<attribute>` to be used without a state
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## 1.2.4
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- On `subscribe:children`, scroll new elements into view
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+116
-36
@@ -5,20 +5,16 @@ import { v4 } from "uuid";
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*/
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/* Types */
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export interface Identifiable {
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uuid: UUID;
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id: string;
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}
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export interface Stringifiable {
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toString: () => string;
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}
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/* Utility */
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export class UUID {
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readonly value: string;
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constructor() {
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this.value = v4();
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}
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toString(): string {
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return this.value;
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}
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export function UUID(): string {
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return v4();
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}
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/* State */
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@@ -30,10 +26,12 @@ export class State<T> {
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private _value: T;
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private _bindings = new Set<StateSubscription<T>>();
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// init
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constructor(initialValue: T) {
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this._value = initialValue;
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}
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// value
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get value(): T {
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return this._value;
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}
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@@ -44,6 +42,7 @@ export class State<T> {
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this.callSubscriptions();
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}
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// subscriptions
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callSubscriptions(): void {
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this._bindings.forEach((fn) => fn(this._value));
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}
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@@ -52,43 +51,66 @@ export class State<T> {
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this._bindings.add(fn);
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fn(this._value);
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}
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// stringify
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toString(): string {
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return JSON.stringify(this._value);
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}
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}
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export class ListState<T extends Identifiable> extends State<Set<T>> {
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private additionHandlers = new Set<AdditionSubscription<T>>();
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private removalHandlers = new Map<UUID, RemovalSubscription<T>>();
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private removalHandlers = new Map<string, RemovalSubscription<T>>();
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constructor() {
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super(new Set<T>());
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// init
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constructor(initialItems?: T[]) {
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super(new Set<T>(initialItems));
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}
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// list
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add(...items: T[]): void {
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items.forEach((item) => {
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this.value.add(item);
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this.additionHandlers.forEach((handler) => handler(item));
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});
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this.callSubscriptions();
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}
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remove(...items: T[]): void {
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items.forEach((item) => {
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this.value.delete(item);
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const uuid = item.uuid;
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const id = item.id;
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if (!this.removalHandlers.has(uuid)) return;
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this.removalHandlers.get(uuid)!(item);
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this.removalHandlers.delete(uuid);
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if (!this.removalHandlers.has(id)) return;
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this.removalHandlers.get(id)!(item);
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this.removalHandlers.delete(id);
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});
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this.callSubscriptions();
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}
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clear() {
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this.remove(...this.value.values());
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}
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// handlers
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handleAddition(handler: AdditionSubscription<T>): void {
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this.additionHandlers.add(handler);
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[...this.value.values()].forEach(handler);
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}
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handleRemoval(item: T, handler: RemovalSubscription<T>): void {
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this.removalHandlers.set(item.uuid, handler);
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this.removalHandlers.set(item.id, handler);
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}
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// stringification
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toString(): string {
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const array = [...this.value];
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const json = JSON.stringify(array);
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return json;
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}
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}
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// UTILITY
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export function createProxyState<T>(
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statesToSubscibe: State<any>[],
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fn: () => T
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@@ -100,9 +122,49 @@ export function createProxyState<T>(
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return proxyState;
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}
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function persistState(localStorageKey: string, state: State<any>) {
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state.subscribe(() => {
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const stringifiedValue = state.toString();
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localStorage.setItem(localStorageKey, stringifiedValue);
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});
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}
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export function restoreState<T>(
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localStorageKey: string,
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initialStateValue: T
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): State<T> {
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const storedString =
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localStorage.getItem(localStorageKey) ??
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JSON.stringify(initialStateValue);
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const convertedValue = JSON.parse(storedString);
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const state = new State(convertedValue);
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persistState(localStorageKey, state);
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return state;
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}
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export function restoreListState<T extends Identifiable>(
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localStorageKey: string
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): ListState<T> {
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const storedString = localStorage.getItem(localStorageKey) ?? "";
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let initialItems: any[] = [];
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try {
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const array = JSON.parse(storedString);
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if (!Array.isArray(array)) throw "";
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initialItems = array;
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} catch {}
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const state = new ListState<T>(initialItems);
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persistState(localStorageKey, state);
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return state;
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}
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export type ListItemConverter<T extends Identifiable> = (
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item: T,
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listState: ListState<T>
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item: T
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) => HTMLElement;
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/*
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@@ -139,20 +201,27 @@ export function createElement(
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}
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case "subscribe": {
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if (directiveValue == "children") {
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const [listState, toElement] = value as [
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listState: ListState<any>,
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(
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item: any,
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listState: ListState<any>
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) => HTMLElement
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];
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listState.handleAddition((newItem) => {
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const child = toElement(newItem, listState);
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listState.handleRemoval(newItem, () =>
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child.remove()
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);
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element.append(child);
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});
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element.style.scrollBehavior = "smooth";
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try {
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const [listState, toElement] = value as [
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listState: ListState<any>,
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(
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item: any,
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listState: ListState<any>
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) => HTMLElement
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];
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listState.handleAddition((newItem) => {
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const child = toElement(newItem, listState);
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listState.handleRemoval(newItem, () =>
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child.remove()
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);
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element.append(child);
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child.scrollIntoView();
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});
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} catch {
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throw `error: cannot process subscribe:children directive because ListItemConverter is not defined. Usage: "subscribe:children={[list, converter]}"; you can find a more detailed example in the documentation`;
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}
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} else {
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const state = value as State<any>;
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state.subscribe(
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@@ -173,9 +242,20 @@ export function createElement(
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break;
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}
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case "toggle": {
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if (value.subscribe) {
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const state = value as State<any>;
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state.subscribe((newValue) =>
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element.toggleAttribute(directiveValue, newValue)
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);
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} else {
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element.toggleAttribute(directiveValue, value);
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}
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break;
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}
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case "set": {
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const state = value as State<any>;
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state.subscribe((newValue) =>
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element.toggleAttribute(directiveValue, newValue)
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element.setAttribute(directiveValue, newValue)
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);
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break;
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}
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+1
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@@ -1,6 +1,6 @@
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{
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"name": "bloatless-react",
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"version": "1.1.3",
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"version": "1.2.4",
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"description": "very minimal and flexible react alternative",
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"repository": {
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"type": "git",
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