Shift Printer

shift-printer is a module that exposes common ways you would probably want to print out JavaScript ASTs. It's a lightweight wrapper around shift-codegen that reduces the boilerplate around printing and logging.

Status

Stable.

Installation

$ npm install shift-printer

Usage

const codegen = require('shift-printer');
const { parseScript } = require('shift-parser');

const ast = parseScript(`function test(a,b,c) { return a+b+c; } test(1,2,3)`);

const src = codegen.prettyPrint(ast);
console.log(src);

// the above two lines can be written as:

codegen.log(ast);

API

.prettyPrint(ast)

Prints with linebreaks, indentation, and spaces.

.print(ast)

alias of .prettyPrint()

.printTerse(ast)

Prints minimal source representation.

.prettyTruncated(ast, length = 50, overflow = '...')

Prints truncated source e.g. function test(a,b,c) { ...

.printSummary(ast)

Node-specific print rules e.g. function test(a, b, c) { ... }

log(ast)

console.log(print(ast))

logTruncated(ast, length = 50, overflow = '...')

console.log(printTruncated(ast, length, overflow))

logTerse(ast)

console.log(printTerse(ast));