fkling/astexplorer: A web tool to explore the ASTs generated by various parsers. @GitHub
acornjs/acorn: A small, fast, JavaScript-based JavaScript parser
AST syntax comes from Mozilla API (leak)
tsc (TypeScript compiler) can parse and generate both JS and TS code
Using the Compiler API · microsoft/TypeScript Wiki
import * as ts from 'typescript';
const printer: ts.Printer = ts.createPrinter();
const sourceFile: ts.SourceFile = ts.createSourceFile(
'test.ts', 'const x : number = 42', ts.ScriptTarget.ES2015, true, ts.ScriptKind.TS
);
console.log(printer.printFile(sourceFile))
Quick look at the TypeScript Compiler API - BLS29 SHOW & TELL WITH CHAU TRAN - YouTube
function add2 (x) { return x + 2 }
acorn =>
{
"type": "Program",
"start": 0,
"end": 34,
"body": [
{
"type": "FunctionDeclaration",
"start": 0,
"end": 34,
"id": {
"type": "Identifier",
"start": 9,
"end": 13,
"name": "add2"
},
"expression": false,
"generator": false,
"async": false,
"params": [
{
"type": "Identifier",
"start": 15,
"end": 16,
"name": "x"
}
],
"body": {
"type": "BlockStatement",
"start": 18,
"end": 34,
"body": [
{
"type": "ReturnStatement",
"start": 20,
"end": 32,
"argument": {
"type": "BinaryExpression",
"start": 27,
"end": 32,
"left": {
"type": "Identifier",
"start": 27,
"end": 28,
"name": "x"
},
"operator": "+",
"right": {
"type": "Literal",
"start": 31,
"end": 32,
"value": 2,
"raw": "2"
}
}
}
]
}
}
],
"sourceType": "module"
}
function add2 (x: number): number { return x + 2 }
tsc =>
{
"pos": 0,
"end": 50,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 33,
"kind": 294,
"statements": [
{
"pos": 0,
"end": 50,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1048609,
"parent": "[Circular ~]",
"kind": 248,
"name": {
"pos": 8,
"end": 13,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0]",
"kind": 78,
"escapedText": "add2"
},
"parameters": [
{
"pos": 15,
"end": 24,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1,
"parent": "[Circular ~.statements.0]",
"kind": 159,
"name": {
"pos": 15,
"end": 16,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0.parameters.0]",
"kind": 78,
"escapedText": "x"
},
"type": {
"pos": 17,
"end": 24,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1,
"parent": "[Circular ~.statements.0.parameters.0]",
"kind": 143
}
}
],
"type": {
"pos": 26,
"end": 33,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1,
"parent": "[Circular ~.statements.0]",
"kind": 143
},
"body": {
"pos": 33,
"end": 50,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1048608,
"parent": "[Circular ~.statements.0]",
"kind": 227,
"statements": [
{
"pos": 35,
"end": 48,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 1048608,
"parent": "[Circular ~.statements.0.body]",
"kind": 239,
"expression": {
"pos": 42,
"end": 48,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0.body.statements.0]",
"kind": 213,
"left": {
"pos": 42,
"end": 44,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0.body.statements.0.expression]",
"kind": 78,
"escapedText": "x"
},
"operatorToken": {
"pos": 44,
"end": 46,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0.body.statements.0.expression]",
"kind": 39
},
"right": {
"pos": 46,
"end": 48,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~.statements.0.body.statements.0.expression]",
"kind": 8,
"text": "2",
"numericLiteralFlags": 0
}
}
}
],
"multiLine": false
}
}
],
"endOfFileToken": {
"pos": 50,
"end": 50,
"flags": 0,
"modifierFlagsCache": 0,
"transformFlags": 0,
"parent": "[Circular ~]",
"kind": 1
},
"fileName": "astExplorer.tsx",
"text": "function add2 (x: number): number { return x + 2 }",
"languageVersion": 99,
"languageVariant": 1,
"scriptKind": 4,
"isDeclarationFile": false,
"hasNoDefaultLib": false,
"bindDiagnostics": [],
"pragmas": {},
"referencedFiles": [],
"typeReferenceDirectives": [],
"libReferenceDirectives": [],
"amdDependencies": [],
"nodeCount": 15,
"identifierCount": 4,
"identifiers": {},
"parseDiagnostics": [],
"path": "astExplorer.tsx",
"resolvedPath": "astExplorer.tsx",
"originalFileName": "astExplorer.tsx",
"imports": [],
"moduleAugmentations": [],
"ambientModuleNames": []
}
