Tips for maintaining the webcam video in the center of the screen even when the height is set to 100% and the window is being resized

When using React, I encountered an issue with centering a webcam video while maintaining its height at 100% of the screen. Although the video fills the screen vertically correctly, adjusting the width of the window causes the video to lose its centered position.

return (
  <div style={style.container}>
    <video style={style.video}
           ref={this.videoRef}
           autoPlay={true}></video>
  </div>
)

const style = {
  container: {
    position: 'absolute',
    width: '100%',
    height: '100%', 
    overflow: 'hidden',
  },
  video: {
    transform: 'rotateY(180deg)',
    height: '100%',
    objectFit: 'contain',
    objectPosition: 'center'
  }
}

Currently, the video is aligned along the left side of the window, rather than staying centered as desired.

htmlcssreactjs

Answer №1

When your video has a width of 100%, it is recommended to utilize left:50%; and margin-left:-50%;. Do you find this information helpful?

Answer №2

To tackle this issue, one effective solution involves incorporating the following CSS properties:

position: 'relative',
transform: 'rotateY(180deg) translateX(50%)',
left: '50%'

This implementation can be further enhanced by applying the styles below:

const style = {
    container: {
        position: 'absolute',
        width: '100%',
        height: '100%', 
        overflow: 'hidden',
    },
    video: {
        position: 'relative',
        left: '50%',
        transform: 'rotateY(180deg) translateX(50%)',
        height: '100%',
        objectFit: 'contain',
        objectPosition: 'center'
    }
}

Answer №3

consider implementing flexbox for a more responsive design

const customStyle = {
  wrapper: {
    display: 'flex';
    alignItems: 'center';
    justifyContent: 'center';
    height: 'auto';
  }
}

Answer №4

Many thanks to all who contributed, as it ultimately led me to the solution that finally worked:

const styles = {
  outerContainer: {
    position: 'relative',
    width: '100%',
    height: '100%', 
    overflow: 'hidden',
  },
  videoElement: {
    position: 'absolute',
    transform: 'rotateY(180deg)',
    height: '100%',
    width: '100%',
    left: '50%',
    marginLeft: '-50%',
    objectFit: 'cover',
    objectPosition: 'center'
  }
}

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