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Hide and Show Div using getElementsByClassName of Html in webview ios

//Hide
[_webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName(\"cseSearchHeader\")[0].style.display=\"none\";"];
   
//Show
[_webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName(\"cseSearchHeader\")[0].style.display=\"block\";"];

   

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