body {
  /**
 * Conic gradients test
 * PASS if green gradient, FAIL if red.
 */

background: red;
background: conic-gradient(limegreen, green, limegreen);
min-height: 100vh;
}
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External CSS

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External JavaScript

  1. https://www.w3cplus.com/sites/default/files/blogs/2015/1509/conic-gradient.js