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59 debounce and throttle example.html
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59 debounce and throttle example.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<input type="text" />
<div>
<b>Default:</b>
<span id="default"></span>
</div>
<div>
<b>Debounce:</b>
<span id="debounce"></span>
</div>
<div>
<b>Throttle:</b>
<span id="throttle"></span>
</div>
<script>
//watch at 14:50 important
const input = document.querySelector("input");
const defaultText = document.getElementById("default");
const debounceText = document.getElementById("debounce");
const throttleText = document.getElementById("throttle");
const updateDebounceText = debounce(() => {
incrementCount(debounceText)
});
const updateThrottleText = throtle(() => {
incrementCount(throttleText)
});
function debounce(cbFunc, delay = 1000) {
let timeout;
return (...args) => {
clearTimeout(timeout);
timeout = setTimeout(() => {
cbFunc(...args);
}, delay);
};
}
function throtle(cb, delay = 1000) {
let shouldWait = false;
let waitingArgs;
const timeoutFunc = () => {
if (waitingArgs == null) {
shouldWait = false;
} else {
cb(...waitingArgs);
waitingArgs = null;
setTimeout(timeoutFunc, delay);
}
};
return (...args) => {
if (shouldWait) {
waitingArgs = args;
return;
}
cb(...args);
shouldWait = true;
setTimeout(timeoutFunc, delay);
};
}
//calling debounce , throttle and default using mousemove
document.addEventListener("mousemove", e =>{
incrementCount(defaultText)
updateDebounceText();
updateThrottleText();
})
function incrementCount(element){
element.textContent=(parseInt(element.innerText) || 0)+1;
}
</script>
</body>
</html>