[JavaScript] 节流函数throttle的实现及其应用
2019-03-06 本文已影响0人
jiansheng
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>throttle</title>
</head>
<body>
<button id="btn_0">simple button</button>
<button id="btn_1">throttle button</button>
<script>
(function () {
function throttle(fn, interval = 500) {
let timerId = null;
let previousTime = 0;
return function () {
const self = this;
const args = arguments;
const now = Date.now();
const diffTime = now - previousTime;
if (diffTime >= interval) {
if (!timerId) {
previousTime = now;
fn.apply(self, args);
timerId = setTimeout(() => {
timerId = null;
}, interval);
}
}
}
}
function clg(a, b, c) {
console.log(a, b, c);
}
document.getElementById('btn_0')
.addEventListener('click', function (event) {
clg(1, 2, 3);
});
const throttledClg = throttle(clg);
document.getElementById('btn_1')
.addEventListener('click', function (event) {
throttledClg(1, 2, 3);
});
})();
</script>
</body>
</html>
