<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>web Storage</title>
<!--
1.存储内容大小一般支持5MB左右(不同浏览器可能不一样)
2.浏览器通过Window.sessionStorage 和 Window.locaStorage 属性来实现本地存储机制
3.相关API:
1.XXXXXStorage.setItem('key','value');key=键 value=值。会把键值添加到存储中,如果健名存在,则更新对应值
2.xxxxxStorage.getItem('porson') porson=键,返回value=值。
3.xxxxxStorage.removeItem('key')key=键。删除对应键值
4.xxxxxStorage.clear() 清空所有存储数据
4.备注:
SessionStorage存储内容会随着浏览器窗口关闭而消失
LocalStorage存储的内容,需要手动清除才会消失
xxxxxStorage.getItem(xxx)如果对应value获取不到,那么getItem的返回值是null
JSON.parse(null)的结果依然是null
-->
</head>
<body>
</body>
</html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>sessionStorage</title> </head> <body> <h2>sessionStorage</h2> <button onclick="saveData()">点击保存一个数据</button> <button onclick="readData()">点击读取一个数据</button> <button onclick="deleteData()">点击删除一个数据</button> <button onclick="deleteAllData()">点击清空一个数据</button> <script> function saveData(){ let p = {name:'张三',age:18} sessionStorage.setItem('msg','hello'); sessionStorage.setItem('msg2',666); //转换为字符串 sessionStorage.setItem('msg3',JSON.stringify(p)) } function readData(){ console.log(sessionStorage.getItem('msg')); console.log(sessionStorage.getItem('msg2')); const result = sessionStorage.getItem('msg3'); console.log(JSON.parse(result)) } function deleteData(){ sessionStorage.removeItem('msg') sessionStorage.removeItem('msg2') sessionStorage.removeItem('msg3') } function deleteAllData(){ sessionStorage.clear() } </script> </body> </html>标签:locaStorage,存储,key,sessionStorage,Window,getItem,removeItem From: https://www.cnblogs.com/lvjinlin/p/17864791.html