Don't do bolding if width is not readable (e.g., inside a container with display:none). Resolves issue #194.

Author: dpvc

extensions/TeX/autobold.js

@@ -12,5 +12,5 @@
  *      http://www.apache.org/licenses/LICENSE-2.0
  */
 
-MathJax.Extension["TeX/autobold"]={version:"2.0"};MathJax.Hub.Register.StartupHook("TeX Jax Ready",function(){var a=MathJax.InputJax.TeX;a.prefilterHooks.Add(function(d){var c=d.script.parentNode.insertBefore(document.createElement("span"),d.script);c.visibility="hidden";c.style.fontFamily="Times, serif";c.appendChild(document.createTextNode("ABCXYZabcxyz"));var b=c.offsetWidth;c.style.fontWeight="bold";if(c.offsetWidth===b){d.math="\\boldsymbol{"+d.math+"}"}c.parentNode.removeChild(c)});MathJax.Hub.Startup.signal.Post("TeX autobold Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/autobold.js");
+MathJax.Extension["TeX/autobold"]={version:"2.0"};MathJax.Hub.Register.StartupHook("TeX Jax Ready",function(){var a=MathJax.InputJax.TeX;a.prefilterHooks.Add(function(d){var c=d.script.parentNode.insertBefore(document.createElement("span"),d.script);c.visibility="hidden";c.style.fontFamily="Times, serif";c.appendChild(document.createTextNode("ABCXYZabcxyz"));var b=c.offsetWidth;c.style.fontWeight="bold";if(b&&c.offsetWidth===b){d.math="\\boldsymbol{"+d.math+"}"}c.parentNode.removeChild(c)});MathJax.Hub.Startup.signal.Post("TeX autobold Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/autobold.js");
 

unpacked/extensions/TeX/autobold.js

@@ -34,7 +34,7 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
     span.appendChild(document.createTextNode("ABCXYZabcxyz"));
     var W = span.offsetWidth;
     span.style.fontWeight = "bold";
-    if (span.offsetWidth === W) {data.math = "\\boldsymbol{"+data.math+"}"}
+    if (W && span.offsetWidth === W) {data.math = "\\boldsymbol{"+data.math+"}"}
     span.parentNode.removeChild(span);
   });