获取页面高度 height scroll

按 F11 浏览器全屏后高度会增加，尤其需要注意

function f(){ document.querySelector('div[widgetname=FORM]').style='';
    document.querySelector('div[widgetname=BODY]').style='';
     }

f()

var body = document.body,
    html = document.documentElement;

var height = Math.max( body.scrollHeight, body.offsetHeight,
                       html.clientHeight, html.scrollHeight, html.offsetHeight );
height
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 # 这段代码去掉滚动条
  await page.evaluate('''() =>{ document.querySelector('div[widgetname=FORM]').style='';
    document.querySelector('div[widgetname=BODY]').style=''; 
     }''')

    js = '''
     () => {
          var body = document.body,
html = document.documentElement;

var height = Math.max( body.scrollHeight, body.offsetHeight,
                       html.clientHeight, html.scrollHeight, html.offsetHeight );
 return height
     }
    '''
    # 获取执行完 js 后的页面高度
    h = await page.evaluate(js)
    h = h + 83
    print('h', h)
    await page.setViewport({'width': width, 'height': h})
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参考
看 Example 1

https://pptr.dev/api/puppeteer.page.evaluate/