如何在javascript中的页面加载跨度中增加值？

Question

我想增加标签之间的值在JavaScript 例如

<span class="quantity">1</span> 

页面加载后，它会像这样

<span class="shopp-quantity">2</span> 

Answer 1

这是差不多的比yesterday's：

<span class="quantity"></span> 
<script> 
    localStorage['myid'] = 
     document.getElementsByClassName('quantity')[0].innerHTML = 
      parseInt(localStorage['myid'] || '0') + 1; 
</script>