Сборка смены цвета круга WebGL, Edit -> PS -> Player -> Compression Disabled

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    <title>Unity WebGL Player | WebGLTest</title>
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      var container = document.querySelector("#unity-container");
      var canvas = document.querySelector("#unity-canvas");
      var loadingBar = document.querySelector("#unity-loading-bar");
      var progressBarFull = document.querySelector("#unity-progress-bar-full");
      var fullscreenButton = document.querySelector("#unity-fullscreen-button");
      var warningBanner = document.querySelector("#unity-warning");

      // Shows a temporary message banner/ribbon for a few seconds, or
      // a permanent error message on top of the canvas if type=='error'.
      // If type=='warning', a yellow highlight color is used.
      // Modify or remove this function to customize the visually presented
      // way that non-critical warnings and error messages are presented to the
      // user.
      function unityShowBanner(msg, type) {
        function updateBannerVisibility() {
          warningBanner.style.display = warningBanner.children.length ? 'block' : 'none';
        }
        var div = document.createElement('div');
        div.innerHTML = msg;
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        if (type == 'error') div.style = 'background: red; padding: 10px;';
        else {
          if (type == 'warning') div.style = 'background: yellow; padding: 10px;';
          setTimeout(function() {
            warningBanner.removeChild(div);
            updateBannerVisibility();
          }, 5000);
        }
        updateBannerVisibility();
      }

      var buildUrl = "Build";
      var loaderUrl = buildUrl + "/buildproject.loader.js";
      var config = {
        dataUrl: buildUrl + "/buildproject.data",
        frameworkUrl: buildUrl + "/buildproject.framework.js",
        codeUrl: buildUrl + "/buildproject.wasm",
        streamingAssetsUrl: "StreamingAssets",
        companyName: "DefaultCompany",
        productName: "WebGLTest",
        productVersion: "0.1",
        showBanner: unityShowBanner,
      };

      // By default Unity keeps WebGL canvas render target size matched with
      // the DOM size of the canvas element (scaled by window.devicePixelRatio)
      // Set this to false if you want to decouple this synchronization from
      // happening inside the engine, and you would instead like to size up
      // the canvas DOM size and WebGL render target sizes yourself.
      // config.matchWebGLToCanvasSize = false;

      if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {
        container.className = "unity-mobile";
        // Avoid draining fillrate performance on mobile devices,
        // and default/override low DPI mode on mobile browsers.
        config.devicePixelRatio = 1;
        unityShowBanner('WebGL builds are not supported on mobile devices.');
      } else {
        canvas.style.width = "960px";
        canvas.style.height = "600px";
      }
      loadingBar.style.display = "block";

      var script = document.createElement("script");
      script.src = loaderUrl;
      script.onload = () => {
        createUnityInstance(canvas, config, (progress) => {
          progressBarFull.style.width = 100 * progress + "%";
        }).then((unityInstance) => {
          // новая строка ниже !!!
          window.unityInstance = unityInstance;
          loadingBar.style.display = "none";
          fullscreenButton.onclick = () => {
            unityInstance.SetFullscreen(1);
          };
        }).catch((message) => {
          alert(message);
        });
      };
      document.body.appendChild(script);

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    <div style="border: solid 2px black; width: 50 px; height: 40px; text-align:center" onclick="unityInstance.SendMessage('JShook','TintSphere')">Сменить цвет</div>
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