Add support for mathjax

[VicaYang]

Hi, I am using your hexo-generator-amp plugin and that works quite well. However, I notice that because the amp disallow the third party javascript, the formula I write in .md could not be render correctly in amp page.

I notice that amp has support MathML in the beginning of 2018. So I would like to do a little change: when generate the amp page, use the regex to replace $(.*)$ and $$(.*)$$ to <amp-mathml layout="container" data-formula="\[ (.*) \]"> </amp-mathml>

Do you know any idea how to render the formula elegantly except this method? Also, could you provide some hints or information about how and where should I modify the code? I guess I should add a formula.js in the filter to do the replacement and call it in generator.js. Am I correct? I am willing to make a contribution!

[tea3]

@VicaYang
Thank you for using this plugin. As you think, I'd be happy to create formula.js and add it to generator.js. I don't know the original code, so I'm happy to make it.

About fomula.js , Is the following code helpful ?
https://github.com/tea3/hexo-generator-amp/blob/master/lib/filter/vimeo.js#L21
https://github.com/tea3/hexo-generator-amp/blob/master/lib/filter/vimeo.js#L25

About how to add fomula.js to generator.js , Is the following code helpful ?
https://github.com/tea3/hexo-generator-amp/blob/master/lib/generator.js#L29
https://github.com/tea3/hexo-generator-amp/blob/master/lib/generator.js#L111

[VicaYang]

@tea3 Thankyou! I have complete the naive version and test on my blog (e.g. Analysis-of-Covariance). But I am afraid of that will fail because of some other "dirty" case. What should I do next?

[tea3]

@VicaYang Thank you for your pull-request. Please update this plugin.

$ npm install [email protected]