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Add transparent color overlay over an <img> tag

I want to add a transparent black overlay over an img tag with some text in it, like in the example screenshot below. Ideally only with HTML and CSS .

I have been searching for hours and can't find anything.

I know this could be easily done if the image is used as a background, but this isn't an option for us (SEO reasons).

示例叠加屏幕截图

That shouldn't be so bad. Would something like this work? First some HTML:

  #container { position: relative; width: 600px; height: 400px; } #someimg { postion: absolute; top: 0; left: 0; width: 100%; height: 100%; } #overlay { position: absolute; top: 0; left: 0; clear: float; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); color: #ffffff; } 
  <html> <body> <div id="container"> <img id="someimg" src="https://www.w3schools.com/w3images/fjords.jpg"</img> <div id="overlay">This is some text in an overlay</div> </div> </body> </html> 

Mic.com used the following code:

.article-card-8col__overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: -webkit-linear-gradient(top,transparent,rgba(0,0,0,.9));
  background: linear-gradient(to bottom,transparent,rgba(0,0,0,.9));
}

I changed it slightly. You could also use their code with on a sibling div element of the image & the parent having position: relative; or use one like mine.

 .wrapper { position: relative; display: inline-block; } .wrapper:after{ content: ""; background: -webkit-linear-gradient(transparent,rgba(0,0,0,.9)); background: linear-gradient(transparent,rgba(0,0,0,.9)); position: absolute; display: block; width: 100%; top: 0; bottom: 0; } 
 <div class="wrapper"> <img src="https://thumbs.mic.com/MTAxZmJlOGIyMSMvYzNOMU1wRTJjMEdyWUZySS1UVjNnMV9LVkZRPS8xMngyNzM6NDk4MHgyODA5LzgwMHg0NTAvZmlsdGVyczpmb3JtYXQoanBlZyk6cXVhbGl0eSg4MCkvaHR0cHM6Ly9zMy5hbWF6b25hd3MuY29tL3BvbGljeW1pYy1pbWFnZXMvanQwY2dmZXZ5aW10aGhqZzBtYXc4cHZxNndrZmdwbmNqNzQzeTB4YmhybWtyOGc0YXYxcHVidWVldzU0OWIwcC5qcGc.jpg" /> </div> 

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