[whatwg] template element?

[fantasai]

The current repetition model adds four global attributes to every element:
   repeat
   repeat-start
   repeat-min
   repeat-max

If the repetition model continues to develop over the next few years, that
list will increase (e.g. by adding a way to group several templates to use
the same template index), and it's already unweildy. Imagine repeating a
form control. You might have to put attributes for name, type, value,
required, pattern, min, max, step, id, inputmode, onchange... as well as
repeat, repeat-start, repeat-min, repeat-max, and any others. Would it
perhaps make more sense to create a <template> element?

<template repeat-min="1" repeat-max="20" repeat-start="5">
   <element/>
</template>

would be equivalent to

<element repeat="template" repeat-min="1" repeat-max="20" repeat-start="5"/>

and the repeat attribute will continue to be global. (It will no longer
be overloaded with the "template" value.)

~fantasai

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