css - How to change visibility on an html button before rendering the html it is in? Rails -

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मैं एक html बटन & lt; button style = 'display: none' & gt; clear & lt; / button & gt ; = true ।

देखें 

  & lt; बटन शैली = 'प्रदर्शन: कोई नहीं' & gt; स्पष्ट & lt; / button & gt;

नियंत्रक 

  $ शो = गलत डीएफ़ प्रिंट अगर $ शो # बटन बटन अंत की समाप्ति

इस तरह से सरल? 

  & lt; बटन शैली = 'प्रदर्शन: & lt;% = $ शो? "इनलाइन": "कोई नहीं" & gt; '& gt; स्पष्ट & lt; / button & gt;

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