HTML5 - 本地存储API

localStorage

• 特点
  1）永久生效
  2）多窗口共享
  3）容量大约20M
• 事件
  1）window.localStorage.setItem(key, value) 设置存储内容

<script type="text/javascript">
    window.localStorage.setItem('wechat', 'remaizhan'); 
    window.localStorage.setItem('employee', '[{"name":"Petter", "age":26}, {{"name":"Tom", "age":28}]'); 
</script>

2）window.localStorage.getItem(key) 获取内容

<script type="text/javascript">
    var wechat = window.localStorage.getItem('wechat'); 
    console.log(wechat);
</script>

3）window.localStorage.removeItem(key) 删除内容

<script type="text/javascript">
    window.localStorage.removeItem('wechat'); 
</script>

4）window.localStorage.clear() 清空内容

<script type="text/javascript">
    window.localStorage.clear(); 
</script>

sessionStorage

• 特点
  1）生命周期为关闭当前窗口
  2）只能在当前窗口下访问
  3）容量大约5M
• 事件
  1）window.sessionStorage.setItem(key, value) 设置存储内容

<script type="text/javascript">
    window.sessionStorage.setItem('wechat', 'remaizhan'); 
    window.sessionStorage.setItem('employee', '[{"name":"Petter", "age":26}, {{"name":"Tom", "age":28}]'); 
</script>

2）window.sessionStorage.getItem(key) 获取内容

<script type="text/javascript">
    var wechat = window.sessionStorage.getItem('wechat'); 
    console.log(wechat);
</script>

3）window.sessionStorage.removeItem(key) 删除内容

<script type="text/javascript">
    window.sessionStorage.removeItem('wechat'); 
</script>

4）window.sessionStorage.clear() 清空内容

<script type="text/javascript">
    window.sessionStorage.clear(); 
</script>