css - HTML role attribute causes content to not display -


नमस्ते वहाँ मेरे मुख्य सामग्री को परिभाषित करने के लिए role = "main" विशेषता का उपयोग कर रहा हूं पृष्ठ। समस्या यह है कि अगर मैं इसका उपयोग करता हूं: 

  & lt; div role = "main" & gt; & lt; आलेख वर्ग = "पोस्ट-पूर्वावलोकन" & gt; & Lt; div class = "post-preview-img" शैली = "पृष्ठभूमि-छवि: url (आईएमजी / केपीईएनआरजी। जेपीजी);" & gt; & lt; / div & gt; & Lt; / लेख & gt; & Lt; / div & gt;   
 मेरी सामग्री प्रदर्शित नहीं होगी? यदि मैं  div  टैग को  भूमिका  विशेषता से किसी भी समस्या के बिना प्रदर्शित करता है, तो इसे हटा देता है।  
 मेरा सीएसएस इस प्रकार है:  
 < कोड> div [भूमिका = "मुख्य"] लेख। पोस्ट-पूर्वावलोकन {चौड़ाई: 100%; ऊंचाई: 100%; मार्जिन: 0 पिक्स; पैडिंग: 0 पिक्सेल; स्थिति: रिश्तेदार; } div [भूमिका = "मुख्य"] लेख.post-preview div.post-preview-img {width: inherit; ऊँचाई: वारिस; पृष्ठभूमि का आकार: कवर; पृष्ठभूमि स्थिति: केंद्र; पृष्ठभूमि दोहराने: नहीं दोहराने; स्थिति: पूर्ण; अस्पष्टता: 1; z- सूचकांक: 2; }   
 अगर कोई मुझे कोई गलत जानकारी दे सकता है तो मैं इसकी सराहना करता हूं।   
 
 
 / मजबूत>, और कुछ भी नहीं ...

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