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donbrae/Reactive UI with Proxy object.html

Last active March 8, 2023 08:24
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Reactive UI with Proxy object
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Reactive UI with Proxy object.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>Reactive UI with Proxy object</title>
</head>
<body>
<!-- Comment which got me thinking: https://news.ycombinator.com/item?id=35062021 -->
<p>Count:
<span id="count"></span>
</p>
<script>
const appState = {
count: 0
};
const stateHandler = {
get: function (target, property) {
console.log('get', target, property);
return target[property];
},
set: function (target, property, value) {
console.log('set', target, property, value);
target[property] = value;
updateCount();
}
};
const proxiedState = new Proxy(appState, stateHandler);
function updateCount() {
const countElem = document.getElementById('count');
countElem.textContent = proxiedState.count;
}
updateCount(); // Initialize onscreen value with initial state value
</script>
<button onclick="proxiedState.count++;">Increment</button>
</body>
</html>
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