aragonite

  # convert guard clauses to optional chaining
  ast-grep -pattern '$A && $A.$B' --rewrite '$A?.$B' -lang ts

  # convert self-assignment to nullish coalescing assignment
  ast-grep -pattern '$X = $X ?? $Y' --rewrite '$X ??= $Y' -l ts

  # convert arrow functions to function declarations (need separate patterns for async & for return-type-annotated though)
  ast-grep -pattern 'const $NAME = ($$$PARAMS) => { $$$BODY }' --rewrite 'function $NAME($$$PARAMS) { $$$BODY }' -l ts

  # convert indexOf checks to .includes()
  ast-grep -pattern '$A.indexOf($B) !== -1' --rewrite '$A.includes($B)' -l ts

  en-US,en;q=0.9,zh-CN;q=0.8,de;q=0.7,ja;q=0.6