Add local directives about background image #4
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It supports background image by using Marpit's local directives. This way follows reveal.js. A difference is that Marpit must use
url()
prefix to specify external resource because of using pure CSS style to supportlinear-gradient()
,radial-gradient()
and so on.However, we will not regard that it is the only feature for supporting background image. The pre-released version of Marp have
![bg]()
syntax, and Marpit will follow it by adding a markdown-it plugin to convert syntax. We will work about its implementation as soon as finished work about this PR.ToDo