Full grammar

This page is a compact, human‑readable grammar reference for CFS.

Program

• use statements (optional)
• behavior blocks

Behavior block

behavior <selector> {
  <declarations>
  [construct]
  [destruct]
  [on]
  [nested behavior]
}

Declarations

• State: name: value;
• Bindings: @attr :< expr;, $style := expr;
• Flags: !important, !debounce(200)

Statements

• if, for, while, try/catch
• Assignments (including +=, -=, *=, /=)
• Function declarations and calls
• Return values

Known limitations

• No classes
• No module system inside CFS
• HTML templating is intentionally minimal