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<html><head><meta charset="utf-8"><title></title></head><body><div id="price">1999</div><button id="btn">新增</button></body><script type="text/javascript">document.querySelector("#btn").addEventListener("click", () => {animation(1000, 1999, 199);})function animation(duration, from, to) {const dis = to - from;const speed = dis / duration;const startTime = Date.now();let value = from; //当前值function _run() {const now = Date.now();const time = now - startTime;if (time >= duration) {value = to;document.querySelector("#price").innerText = valuereturn false;}const d = Math.round(time * speed);value = from + d;document.querySelector("#price").innerText = valuerequestAnimationFrame(_run)}requestAnimationFrame(_run)}</script>
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