text: <!DOCTYPE html>
  <html lang="en">
  <head>
  	<meta charset="UTF-8">
  	<title>Document</title>
  	<style type="text/css">
  	
  		.test1{font-size:20px; line-height:1.5; border:1px solid #cccccc; background:#eeeeee;}
  		.test2{font-size:0; line-height:20px; border:1px solid #cccccc; background:#eeeeee;}
  
  	</style>
  </head>
  <body>
  <div class="test1">测试</div><br/>
  <div class="test2">测试</div>
  
  
  <script type="text/javascript">
  		
  		console.dir(document.querySelector('.test1').clientHeight  )
  
  
  </script>
  
  </body>
  </html>
  