Directive: declare
Use a declare tag to create named variables within a block scope. This is analogous to a variable declaration in Dart.
This Dart code:
var one = 1, two = 2, three = null;
Becomes this Jael:
<declare one=1 two=2 three>
// Scoped content...
</declare>
Another example (this is actually the test for declare functionality):
<div>
<declare one=1 two=2 three=3>
<ul>
<li>{{one}}</li>
<li>{{two}}</li>
<li>{{three}}</li>
</ul>
<ul>
<declare three=4>
<li>{{one}}</li>
<li>{{two}}</li>
<li>{{three}}</li>
</declare>
</ul>
</declare>
</div>
Which yields:
<div>
<ul>
<li>
1
</li>
<li>
2
</li>
<li>
3
</li>
</ul>
<ul>
<li>
1
</li>
<li>
2
</li>
<li>
4
</li>
</ul>
</div>
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