{ "type": "Program", "body": [ { "type": "ExpressionStatement", "expression": { "type": "Literal", "value": "use strict" } } ] } { "type": "Program", "body": [ { "type": "FunctionDeclaration", "id": { "type": "Identifier", "name": "f" }, "params": [], "defaults": [], "rest": null, "body": { "type": "BlockStatement", "body": [ { "type": "ExpressionStatement", "expression": { "type": "Literal", "value": "use strict" } } ] }, "generator": false, "expression": false } ] }