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const targetMap = new WeakMap();
let activeEffect = null;
const root = document.getElementById("root");
function createElement(tagName, props = {}, children = []) {
const el = document.createElement(tagName);
for (const [key, value] of Object.entries(props || {})) {
if (key.startsWith("on") && typeof value === "function") {
el.addEventListener(key.substring(2).toLowerCase(), value);
} else if (key === "style" && typeof value === "object") {
Object.assign(el.style, value);
} else {
el.setAttribute(key, value);
}
}
const appendChild = (child) => {
if (Array.isArray(child)) {
child.forEach(appendChild);
} else if (typeof child === "function") {
const placeholder = document.createTextNode("");
el.appendChild(placeholder);
e(() => {
placeholder.textContent = child() ?? "";
});
} else if (child instanceof Node) {
el.appendChild(child);
} else if (child != null) {
el.appendChild(document.createTextNode(String(child)));
}
};
children.forEach(appendChild);
return el;
}
function track(target, key) {
if (!activeEffect) {
return;
}
let depsMap = targetMap.get(target);
if (!depsMap) {
depsMap = new Map();
targetMap.set(target, depsMap);
}
let dep = depsMap.get(key);
if (!dep) {
dep = new Set();
depsMap.set(key, dep);
}
dep.add(activeEffect);
}
function trigger(target, key) {
const depsMap = targetMap.get(target);
if (!depsMap) {
return;
}
const dep = depsMap.get(key);
if (dep) {
dep.forEach((effect) => effect());
}
}
//**
// Create a reactive value, the value is at .value.
// To use this in element props you need to supply the .value read as a function.
// */
export function r(target) {
target = { value: target };
return new Proxy(target, {
get(obj, key, receiver) {
track(obj, key);
return Reflect.get(obj, key, receiver);
},
set(obj, key, value, receiver) {
const result = Reflect.set(obj, key, value, receiver);
trigger(obj, key);
return result;
},
});
}
//**
// Run code when value changes
// */
export function e(fn) {
let active = true;
const runner = () => {
if (active) {
activeEffect = runner;
fn();
activeEffect = null;
}
};
runner();
runner.stop = () => {
active = false;
};
return runner;
}
export function gqp(key) {
return new URLSearchParams(location.search).get(key)
}
export function sqp(query) {
if ('URLSearchParams' in window) {
const url = new URL(window.location)
for (const key of Object.keys(query)) {
const value = encodeURIComponent(query[key])
if (!value || value === "") url.searchParams.delete(key)
else url.searchParams.set(key, value)
}
history.pushState(null, '', url);
}
}
//**
// Combine elements
// */
export function c(a, b) {
const normalize = (x) => (x == null ? [] : Array.isArray(x) ? x : [x]);
return [...normalize(a), ...normalize(b)];
}
//**
// Mount element to a target (target is #root by default)
// */
export async function m(component, target = root) {
if (typeof component === "function") {
component = await component();
}
if (Array.isArray(component)) {
target.append(...component);
} else {
target.appendChild(component);
}
}
export function css(styleObject) {
return Object.entries(styleObject).map(([key, value]) => {
const kebabKey = key.replace(/([a-z])([A-Z])/g, "$1-$2").toLowerCase();
return `${kebabKey}: ${value}`;
}).join("; ");
}
//**
// Create element
// */
export function t(name, props, ...children) {
if (typeof name === "function") {
return name({ ...props, children });
}
return createElement(name, props, children);
}
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