This code snippet represents an HTML <img> tag with a very complex background-image style. Let’s break down what’s happening:
1. The <img> Tag:
* <img src="x" loading="lazy" style="..."> This is a standard HTML image tag.
* src="x": The src attribute is set to “x”. This is unusual and likely a placeholder. The image isn’t actually loading from a URL. The image’s content is entirely defined by the background-image style.
* loading="lazy": This attribute tells the browser to only load the image when it’s near the viewport, improving page load performance. However, in this case, it’s largely irrelevant because the image content is defined by the background.
* style="...": This attribute contains a long string of CSS styles that define the appearance of the image.
2. The background-image Style:
* background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg ..."): This is the core of the code. It sets the background image of the <img> tag to a data URI. A data URI embeds the image data directly within the HTML code, avoiding the need for a separate image file.
* data:image/svg+xml;charset=utf-8,...: this indicates that the data URI contains an SVG (scalable Vector Graphics) image. charset=utf-8 specifies the character encoding.
* %3Csvg ...: The rest of the string is the URL-encoded SVG code. The %3C represents < and so on. This is how the SVG is represented as text within the data URI.
3. The SVG Code (Inside the Data URI):
The SVG code is quite complex.Let’s break it down into its main parts:
* <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 640 640'>: this defines the SVG document.
* xmlns='http://www.w3.org/2000/svg': The XML namespace for SVG.
* viewBox='0 0 640 640': Defines the coordinate system of the SVG. it means the SVG content is designed to fit within a 640×640 pixel area.
* <filter id='b' color-interpolation-filters='sRGB'>: This defines a filter effect that will be applied to an image within the SVG.
* id='b': A unique identifier for the filter.
* color-interpolation-filters='sRGB': Specifies the color space for interpolation.
* <feGaussianBlur stdDeviation='20'/>: This is a filter primitive that applies a Gaussian blur.stdDeviation='20' controls the amount of blur. This is applied twice.
* <feColorMatrix values='1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 100 -1' result='s'/>: This filter primitive applies a color matrix transformation. The values attribute defines the matrix. This specific matrix effectively inverts the colors and increases the contrast.
* <feFlood x='0' y='0' width='100%' height='100%'/>: This creates a solid color flood. By default, it’s black.
* <feComposite operator='out' in='s'/>: This combines the flood color with the result of the color matrix (s) using the “out” operator. This effectively creates a mask.
* **`Related
