Can not import font into mjml - import

Question

mj-font does not work in mjml.
Here is what I am trying to do in index.mjml:
<mjml>
<mj-head>
<mj-font name="testFont" href="testFont.ttf"/>
</mj-head>
<mj-body>
<mj-section>
<mj-column>
<mj-text font-family="testFont" align="center" font-size="20px">
Just a text
</mj-text>
</mj-column>
</mj-section>
</mj-body>
</mjml>
Here is the screenshot of the project directory:
Here is what I see in the app:
And here is what the font should look like:
What am I missing here and how could I make my font work?
Thank you.

Answer 1

I have found it difficult to use custom fonts using the mj-font tag. If you use a google font api it seems to work correctly.
Example using Google font
<mj-font name="Raleway" href="https://fonts.googleapis.com/css?family=Raleway" />
Taking that into consideration, I have started to using the following and has worked for me: (it goes between <mj-style></mj-style> tags)
#font-face {
font-family: testFont;
src: url(https://cdn2.hubspot.net/hubfs/199900/fonts/someFontFile.ttf)
format('truetype');
}
I would normally use a .woff file instead of a .ttf file.
Diving deeper into it, if you go to a Google font link such as https://fonts.googleapis.com/css?family=Raleway in your web browser, the contents of the file is this:
/* latin-ext */
#font-face {
font-family: 'Raleway';
font-style: normal;
font-weight: 400;
src: local('Raleway'), local('Raleway-Regular'), url(https://fonts.gstatic.com/s/raleway/v13/1Ptug8zYS_SKggPNyCMIT4ttDfCmxA.woff2) format('woff2');
unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
#font-face {
font-family: 'Raleway';
font-style: normal;
font-weight: 400;
src: local('Raleway'), local('Raleway-Regular'), url(https://fonts.gstatic.com/s/raleway/v13/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
Back to your problem... Since the file that you are loading with the <mj-font> tag is a binary file, I would imagine that mjml doesn't know how to process it. If the file were a .woff font file then it might work. Perhaps they could change this in the near future. After all, it is a very useful tool.