SOURCE

console 命令行工具 X clear 

                    

                        
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console

            
<div>
  <div style="margin: 50px;position: relative;width: 800px;height: 400px;background-color: #DDD;overflow: hidden;">
    <div id="block" style="position: absolute;left: 100px;top: 100px;width: 1600px;height: 800px;background-color: red;" tabindex="0"></div>
  </div>
  <button onclick="document.querySelector('#block').focus()">测试</button>
</div>