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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ### 定時器的作用 - 開啟定時器 - `setInterval(函數, 間隔時間)` 間隔型,函數后面不能帶括號和傳參 - `setTimeout(函數, 延時時間)` 延時型 - 兩種定時器的區別,定時器要 `window.onload` 完一秒后才執行 - 停止定時器 - `clearInterval(定時器名字)` - `clearTimeout(定時器名字)` - 代碼: ```js window.onload = function () { var oBtn1 = document.getElementById('btn1'); var oBtn2 = document.getElementById('btn2'); var timer = null; oBtn1.onclick = function () { timer = setInterval(function () { alert('a'); }, 2000); }; oBtn2.onclick = function () { clearInterval(timer); }; }; ```
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