Relocating to the middle of the webpage (Automatically resize for mobile compatibility if feasible)

Apologies for my poor English. Are there any suggestions on how to center this without using margins or other methods? Perhaps there are alternative solutions. https://i.sstatic.net/dXfwL.png

Also, is it feasible for the image and video to automatically adjust to any mobile screen size? Here is the code I implemented:
HTML

<div id="tv_container">
  <iframe width="720" height="480" src="https://www.youtube.com/embed/vToBbWibGw8?controls=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>

CSS

#tv_container {
  width: 720px;
  height: 480px;
  position: relative;
}
#tv_container:after { //frame
  content: '';
  display: block;
  background: url('../home-img/framevid(4).png') no-repeat top left transparent;
  width: 100%;
  height: 100%;
  left: 0px;
  top: 0px;
  position: absolute;
  z-index: 10;
}
#tv_container iframe { //video
  position: absolute;
  top: 30px;
  left: 40px;
  z-index: 5;
}
javascripthtmlcssvue.js

Answer №1

There are several methods to center an image:

  1. Set the margin to auto

margin: 0px auto;

  1. Utilize grids and add the following code in your CSS:

display: flex;
justify-content: center;
// justify-self: center;
// justify-items: center;
// align-items: center;
// ...

  1. I do not recommend using positioning for images, but if you do, consider setting one tag as a parent with relative position and the image (child) with specific directional properties.

For responsive design, avoid setting the image width in pixels and opt for percentage values like:

width: 80%;

Answer №2

My latest project involved dynamically adding CSS and HTML elements using JavaScript. Check out the code snippet below:

#tv_container {
    width: 720px;
    height: 480px;
    position: relative;
}

#tv_container:after {
    content: '';
    display: block;
    background: url('../home-img/framevid(4).png') no-repeat top left transparent;
    width: 100%;
    height: 100%;
    left: 0px;
    top: 0px;
    position: absolute;
    z-index: 10;
}

#tv_container iframe {
    position: absolute;
    top: 30px;
    left: 40px;
    z-index: 5;
}

.frame {
    display: flex;
    justify-content: center;
}
<body>
    <section class="frame">
        <div id="tv_container">
            <iframe width="720" height="480" src="https://www.youtube.com/embed/vToBbWibGw8?controls=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
    </section>
</body>

Answer №3

Apply the text-align: center property to style your element.

It is effective for aligning various objects in the center of the page.

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