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Merge pull request #1596 from dpvc/issue1593

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Don't allow `\require{mhchem}` to override one already loaded.  #1593
This commit is contained in:
Davide P. Cervone 2016-08-24 09:52:33 -04:00 committed by GitHub
commit f0d730eff3
1 changed files with 13 additions and 1 deletions
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14
unpacked/extensions/TeX/mhchem.js
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@ -25,6 +25,14 @@
* limitations under the License.
*/
//
// Don't replace [Contrib]/mhchem if it is already loaded
//
if (MathJax.Extension["TeX/mhchem"]) {
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mhchem.js");
} else {
MathJax.Extension["TeX/mhchem"] = {
version: "2.6.0",
config: MathJax.Hub.CombineConfig("TeX.mhchem",{
@ -32,6 +40,9 @@ MathJax.Extension["TeX/mhchem"] = {
})
};
//
// Load [Contrib]/mhchem if not configured for legacy vesion
//
if (!MathJax.Extension["TeX/mhchem"].config.legacy) {
MathJax.Callback.Queue(
["Require",MathJax.Ajax,"[Contrib]/mhchem/mhchem.js"],
@ -502,4 +513,5 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mhchem.js");
}
}}