寫入緩存 ``` localStorage.setItem('name',data); //緩存名稱為name，值為data 的數據 ``` >[danger]如果要給緩存設置有效期，可以在數據中存上時間戳進行計算有效期 讀取緩存 ``` localStorage.getItem('name') // 讀取緩存名為name的值 ``` 刪除緩存 ~~~ localStorage.removeItem('myCat'); ~~~ ``` // 移除所有 localStorage.clear(); ``` 驗證碼示例 ``` function timeWait(targetID,showID,time) { time=time||60; target=document.getElementById(targetID); show=document.getElementById(showID); var flag='wait-'+targetID+showID; wait=localStorage.getItem(flag); if (wait===null) { localStorage.setItem(flag,time); wait=time; } if (wait == 0) { target.removeAttribute("disabled"); show.value = "發送驗證碼"; show.text = "發送驗證碼"; show.innerHTML = "發送驗證碼"; wait = wait|| 60; localStorage.removeItem(flag); } else { target.setAttribute("disabled", true); show.value = "重新發送" + wait + "s"; show.text = "重新發送" + wait + "s"; show.innerHTML = "重新發送" + wait + "s"; wait=localStorage.getItem(flag); wait=wait-1; localStorage.setItem(flag,wait); // 每秒執行一次 setTimeout(function() { timeWait(targetID,showID,wait) },1000) } } ```