<mt-button size="small" @click="ExportData()" type="primary" style="margin:0px 10px 0px 0px">导出</mt-button>

<code class="language-html">methods:{ 
  ExportData(){ 
  //定义文件内容，类型必须为Blob 否则createObjectURL会报错 
  let content = new Blob([JSON.stringify(this.todos)]) 
 
  //生成url对象 
  let urlObject = window.URL || window.webkitURL || window  
  let url = urlObject.createObjectURL(content)  
  //生成<a></a>DOM元素 
  let el = document.createElement('a') 
  //链接赋值 
  el.href = url 
  el.download ="todo文件导出.txt" 
  //必须点击否则不会下载 
  el.click()  
  //移除链接释放资源  
  urlObject.revokeObjectURL(url) 
  } 
}</code>