tree-sitter/spec/runtime/languages/javascript/main.txt

==========================================
parses multiple statements
==========================================
var x = {};
{};
---
(program
    (statement (assignment (identifier) (object)))
    (statement (object)))

==========================================
parses if statements
==========================================
if (theCondition) {
    var x = 2;
}
---
(program
    (if_statement
        (identifier)
        (statement_block (statement (assignment (identifier) (number))))))

==========================================
parses if-else statements
==========================================
if (theCondition) {
    var x = 2;
} else {
    var x = 4;
}
---
(program (if_statement
    (identifier)
    (statement_block (statement (assignment (identifier) (number))))
    (statement_block (statement (assignment (identifier) (number))))))