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Refactor to arrow functions
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>GoCode</title> | |
<script src="https://unpkg.com/redux@latest/dist/redux.min.js"></script> | |
</head> | |
<body> | |
<div> | |
<p> | |
Counter: <span id="value">0</span> times | |
<button id="increment">+</button> | |
<button id="decrement">-</button> | |
<button id="incrementIfOdd">Increment if odd</button> | |
<button id="incrementAsync">Increment async</button> | |
</p> | |
</div> | |
<script> | |
function counter(state = 0, action) { | |
switch (action.type) { | |
case "INCREMENT": | |
return state + 1; | |
case "DECREMENT": | |
return state - 1; | |
default: | |
return state; | |
} | |
} | |
const store = Redux.createStore(counter); | |
function render() { | |
const valueEl = document.getElementById("value"); | |
valueEl.innerHTML = store.getState().toString(); | |
} | |
render(); | |
store.subscribe(render); | |
document.getElementById("increment").addEventListener("click", () => { | |
store.dispatch({ type: "INCREMENT" }); | |
}); | |
document | |
.getElementById("decrement") | |
.addEventListener("click", () => store.dispatch({ type: "DECREMENT" })); | |
document | |
.getElementById("incrementIfOdd") | |
.addEventListener("click", () => { | |
if (store.getState() % 2 !== 0) { | |
store.dispatch({ type: "INCREMENT" }); | |
} | |
}); | |
document | |
.getElementById("incrementAsync") | |
.addEventListener("click", () => | |
setTimeout(() => store.dispatch({ type: "INCREMENT" }), 1000) | |
); | |
</script> | |
</body> | |
</html> |
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