inline-token has content?

[iliakan]

A regular inline-token has .content with it's text.

E.g: https://markdown-it.github.io/#md3=%7B%22source%22%3A%22!%5Bdesc%20%2Ame%2A%7Cheight%3D100%5D%28fig.png%20%5C%22title%5C%22%29%22%2C%22defaults%22%3A%7B%22html%22%3Afalse%2C%22xhtmlOut%22%3Afalse%2C%22breaks%22%3Afalse%2C%22langPrefix%22%3A%22language-%22%2C%22linkify%22%3Atrue%2C%22typographer%22%3Atrue%2C%22_highlight%22%3Atrue%2C%22_strict%22%3Afalse%2C%22_view%22%3A%22debug%22%7D%7D

Note the "content": "my *inline* token" in the inline tag.

But in case of an image, the image alt forms 1 more children level. A one more inline token. Here it has no content: https://markdown-it.github.io/#md3=%7B%22source%22%3A%22!%5Bdesc%20%2Ame%2A%7Cheight%3D100%5D%28fig.png%29%22%2C%22defaults%22%3A%7B%22html%22%3Afalse%2C%22xhtmlOut%22%3Afalse%2C%22breaks%22%3Afalse%2C%22langPrefix%22%3A%22language-%22%2C%22linkify%22%3Atrue%2C%22typographer%22%3Atrue%2C%22_highlight%22%3Atrue%2C%22_strict%22%3Afalse%2C%22_view%22%3A%22debug%22%7D%7D

Note that the 1st-level inline tag actually has the content: "content": "![desc *me*|height=100](fig.png)".

But what's different with the image tag: it has children, but it's content is empty.
I'd suggest to let it has a string in content just like the regular inline-tag.

Guess the patch should be somewhere here: https://github.com/markdown-it/markdown-it/blob/master/lib/rules_inline/image.js#L139 (if appropriate).

[rlidwka]

We could easily add "content" to this tag, just add this line somewhere below:

token.content = state.src.slice(labelStart, labelEnd);

But children property is there to stay, because with the current tag structure it seems to be only good way to conform to CommonMark tests (img tag has an alt attribute with markdown syntax stripped out, so we'd need to store this markdown syntax somewhere).

[rlidwka]

content property added, thanks for the suggestion!