The pattern is very obvious?
If array: (value, index)=>void
If object: (value, key, index)=>void
If it's an array, it's the call signature for the args of the forEach method, i.e. (value, index)=>void, but can be assigned a function that's just (value)=>void if index is unneeded. If it's an object, it's an extension of the same logic with (value, key, index).
It's not 4 dsls in one, anymore than jsx is a 1000 markups in one.
It's not
> It's not 4 dsls in one, anymore than jsx
I "like" that when discussing these things everyone completely ignores everything, and focuses on one specific thing.
So, again. The claim was that Vue templates is "HTML + Javascript"
1. As v-for clearly shows it's not even close to Javascript, as there are no Javascript constructs that correspond to this
2. As everything else, not just v-for shows, it's neither HTML (so many custom attributes with extensions and shorcuts etc.) nor Javascript.
That's not what vue templates are. It's three or four different templating DSLs in one.
v-for alone will show that it's not HTML with Javascript: https://news.ycombinator.com/item?id=28059397
And there's more: https://news.ycombinator.com/item?id=19199423