Looking for a method to dynamically fill an image based on a percentage.
Is there a dynamic approach or is it simpler to create images at specific intervals?
I am working with Angular and need to set the percentage of a 1 to 5 rating system from AJAX.
If you're looking for a solution, I recommend checking out this post: How to Fill a percentage of an SVG and animate the fill
One approach is to generate an SVG shape such as a star:
<svg width="100px" height="100px" viewBox="0 0 100 100"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<polygon fill="red" stroke="blue" stroke-width="10"
points="350,75 379,161 469,161 397,215
423,301 350,250 277,301 303,215
231,161 321,161" />
</svg>
You can then add a linear gradient to it like this:
<linearGradient y2="100%" x2="100%" y1="100%" x1="0%" id="F1g">
<stop stop-color="#00FF00" offset="0%" id="F1gst1"/>
<stop stop-color="#FFFFFF" offset="0%" id="F1gst2"/>
</linearGradient>
This method is quicker to implement, more adaptable, and uses less network resources compared to generating multiple images with gradual changes.
With just a couple of images and a touch of javascript, creating this effect should be a breeze. Simply use one image with transparency where you want the filling to appear. Then place an image of the same size filled with the desired color behind the first image, adjusting its position using the z-index css property. Through javascript, animate it to gradually fill the transparent image. Check out this example on jsFiddle showcasing the concept.
While not as tidy as an SVG solution, this method can be applied to almost any image.
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