How to Resize Images Proportionally

Resizing images proportionally is a common task that can be used to fit images into specific dimensions while maintaining their aspect ratio. This is especially useful when working with images of different sizes that need to be displayed consistently.

To resize an image proportionally using jQuery, you can use the following code:

$('img').css({
  'max-width': '100%',
  'max-height': '100%',
  'width': 'auto',
  'height': 'auto'
});

This code sets the maximum width and height of the image to 100%, which allows the image to scale proportionally to fit within these dimensions. The 'width' and 'height' properties are set to 'auto' to maintain the original aspect ratio.

Another method for calculating the appropriate dimensions for an image while preserving its aspect ratio is to use the calculateAspectRatioFit() function:

function calculateAspectRatioFit(srcWidth, srcHeight, maxWidth, maxHeight) {

    var ratio = Math.min(maxWidth / srcWidth, maxHeight / srcHeight);

    return { width: srcWidth*ratio, height: srcHeight*ratio };
}

This function takes the original width and height of the image, along with the maximum available width and height, and calculates the new width and height that maintain the aspect ratio within the specified limits.