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console 命令行工具 X clear 

                    

                        
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<h3>H5 web存储的实现</h3>
<h5>localStorage对象和sessionStorage对象：</h5>
<p>h5的web存储是通过浏览器内置的localStorage对象和sessionStorage对象来实现的,属性和方法：</p>
<ol>
  <li>localStorage.setItem(key,value);</li>
  <li>localStorage.getItem(key);</li>
  <li>localStorage.removeItem(key);</li>
  <li>localStorage.clear();</li>
  <li>localStorage.key(index);</li>
</ol>