Why Doesn\'t `transform-origin` Work on SVG Groups in Firefox, and How Can I Fix It?

Transform-Origin on SVG Groups: Firefox Specific Solution

In Firefox, setting the transform-origin on an SVG group has been a persistent issue, leaving developers perplexed as to why it seemingly doesn't function. To address this problem, let's delve into a solution that has proven effective.

To illustrate this issue, consider the following SVG code:

<svg>
  <g></g></svg>

Firefox will ignore the transform-origin property, meaning the group's transformations will not occur around its intended center.

The key to resolving this problem lies in modifying the SVG design. Instead of drawing the shape within the group, it should be created in such a way that its center aligns with the coordinate origin (0, 0). For example:

<svg>
  <rect></rect></svg>

In this scenario, the rectangle's center aligns with the coordinate origin. Subsequently, you can use CSS to create transitions and animations that Firefox will properly execute around the group's center.

For instance, the following CSS snippet would rotate the group (and rectangle) around its center in Firefox:

#myObject {
  transform: rotate(0deg);
  transition: all 1s linear;
}

.csstransforms.csstransitions.js-rotateObject #myObject {
  transform: rotate(360deg);
}

This solution effectively resolves the transform-origin issue in Firefox, allowing for seamless transformations centered around SVG groups.

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