如何更改` <input> 来自wkWebview / webView中Objective-C的元素属性（例如值）

Question

Ok, I Found Certain links from this site,

but the issue is what if the tag doesn't consist id or name?

<input type="email" class="_style_3vhmZK" placeholder="Email: name@example.com" value="" data-reactid="49">

I tried like this:

TRY Number 1:

 NSString *javaScript1 = @"var passFields = document.document.getElementsByTagName('input'); \
            passFields[0].setAttribute('value','Naman')";   [webView evaluateJavaScript:javaScript1 completionHandler:nil];

TRY Number 2

 NSString *javaScript = @"document.getElementsByTagName('input')[0].setAttribute('value','Naman Vaishnav');";    [webView evaluateJavaScript:javaScript1 completionHandler:nil];

But still not achieve Target, Enlighten me if I'm making any mistakes...

Answer 1

Done Via Tags , Welcome to more sufficient way if there is any ,

  NSString *javaScript1 = @"var passFields = document.getElementsByTagName('input'); \
           for (var i = passFields.length>>> 0; i--;) { if(passFields[i].placeholder == 'Email: name@example.com'){ passFields[i].value ='%@';}}";

            NSString *javascriptWithCSSString = [NSString stringWithFormat:javaScript1,emailInfo[0]];
            [webView evaluateJavaScript:javascriptWithCSSString completionHandler:nil];