#学习笔记#(55)sessionStorage/localStorage
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<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <title>session获取和写入会话存储</title></head><body><div id="divVisits"></div><script> /* * sessionStorage.getItem('key'); 或sessionStorage.key * sessionStorage.setItem('key',value);设置参数值 * sessionStorage.removeItem('key');删除参数值 * sessionStorage.clear;清空所有数据,包括参数名和参数值 * sessionStorage.length;存储的参数键值对的个数 * */ function init() { var divVisits = document.getElementById('divVisits'); if(window.sessionStorage){//检测浏览器是否支持sessionStorage var visits; if(sessionStorage.visits){//检测是否已经存储过visits visits=parseInt(sessionStorage.getItem('visits')); visits++; }else{ visits=1; } sessionStorage.setItem('visits',visits); divVisits.innerHTML='当前页面访问量:'+visits; }else{ divVisits='浏览器不支持sessionStorage'; } } window.addEventListener('load',init,false);</script></body></html>
上例将session改成local,亦可保存数据,区别在于,sessionStorage的数据在浏览器关闭之后就失效,而localStorage的数据再打开依旧存在
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