img-novb-width-all-1-ref.html

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<!DOCTYPE HTML>

<html>

<head>

  <link rel="stylesheet" type="text/css" href="svg-image-util.css" />

  <script src="svg-image-util.js"></script>

</head>

<body style="height: 600px"><!-- height for pct vals to resolve against -->

  <script>

      var svgParams = {

        viewBox:  null,   // This gets set on a case-by-case basis below.

        width  :  "20px",

        height :  "20%",

        meetOrSlice: null // This means "use pAR=none"

};

      // Descriptions below describe the behavior of the rows of <img> elements

      // in the corresponding test cases, which we mimic with specially-crafted

      // <embed> elements.

      // * FIRST TWO ROWS: <img> has width=auto height=auto

      //  - Each <img> renders w/ height = 150px (default)

      //  - Synthesized viewBox has height = 20% * viewport_height = .2*150 = 30

      //  - <img> & viewBox both get width=20px, from <svg> width attr

      svgParams.viewBox = [0, 0, 20, 30],

      appendSVGSubArrayWithParams(svgParams, "embed", "20px", "150px");

      // * SECOND TWO ROWS: <img> has width=auto, height=20px

      //  - <img> now renders w/ height = 20px (imposed by <img> height attr)

      //  - Synthesized viewBox has height = 20% * viewport_width = .2*20 = 4

      //  - <img> & viewBox both get width=20px, from <svg> width attr

      svgParams.viewBox = [0, 0, 20, 4],

      appendSVGSubArrayWithParams(svgParams, "embed", "20px", "20px");

      // * THIRD TWO ROWS: <img> has width=30px height=auto

      // Calculations are as with "FIRST TWO ROWS", except <img> now imposes

      // width="30px".

      svgParams.viewBox = [0, 0, 20, 30],

      appendSVGSubArrayWithParams(svgParams, "embed", "30px", "150px");

      // * FOURTH TWO ROWS: <img> has width=30px height=20px

      // Calculations are as with "SECOND TWO ROWS", except <img> now imposes

      // width="30px".

      svgParams.viewBox = [0, 0, 20, 4],

      appendSVGSubArrayWithParams(svgParams, "embed", "30px", "20px");

  </script>

  <!-- Body gets populated by script -->

</body>

</html>