{"action":"opened","issue":{"url":"https://api.github.com/repos/mathjax/MathJax/issues/1427","repository_url":"https://api.github.com/repos/mathjax/MathJax","labels_url":"https://api.github.com/repos/mathjax/MathJax/issues/1427/labels{/name}","comments_url":"https://api.github.com/repos/mathjax/MathJax/issues/1427/comments","events_url":"https://api.github.com/repos/mathjax/MathJax/issues/1427/events","html_url":"https://github.com/mathjax/MathJax/issues/1427","id":144603893,"number":1427,"title":"[TeX input] mhchem and mathrm conflicting","user":{"login":"pkra","id":426686,"avatar_url":"https://avatars.githubusercontent.com/u/426686?v=3","gravatar_id":"","url":"https://api.github.com/users/pkra","html_url":"https://github.com/pkra","followers_url":"https://api.github.com/users/pkra/followers","following_url":"https://api.github.com/users/pkra/following{/other_user}","gists_url":"https://api.github.com/users/pkra/gists{/gist_id}","starred_url":"https://api.github.com/users/pkra/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pkra/subscriptions","organizations_url":"https://api.github.com/users/pkra/orgs","repos_url":"https://api.github.com/users/pkra/repos","events_url":"https://api.github.com/users/pkra/events{/privacy}","received_events_url":"https://api.github.com/users/pkra/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mathjax/MathJax/labels/Accepted","name":"Accepted","color":"48ab4e"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-03-30T14:07:26Z","updated_at":"2016-03-30T14:07:26Z","closed_at":null,"body":"Reported on http://stackoverflow.com/questions/36307606/how-to-use-mathjax-mhchem-extension-with-mathjax-cdn. \r\n\r\nSomething like `\\ce{^{14}_6 \\mathrm{C}}` throws an error (mathrm missing arguments). `\\rm` is a workaround where possible.\r\n\r\nI'm not sure in how far this is expected behavior given the mhchem parers; fwiw, it works in LaTeX with mhchem set to version 1 and version 4. But I don't know the original mhchem well enough.\r\n"}}