v10.1.0

• regex format changed for better JSON serialization /abc/gi: [, new RegExp('abc', 'gi')]→['//', 'abc', 'gi']`
• undefined JSON serializes better: [, undefined] → []
• compile() accepts [null, value] as valid elision form [, value]

Full Changelog: v10.0.0...v10.1.0

v10.0.0

• Template tag syntax: subscript\a + b`(ctx)` with interpolation support
• Jessie preset: metacircular JS subset (parses itself)
• ASI (automatic semicolon insertion) support
• async/await, import/export, try/catch/finally
• Control flow: if/else, for, while, do-while, switch
• Classes, destructuring, rest/spread
• Units: 12px, 3em, regex literals
• bundle utility for self-contained builds
• Statements / keywords registration API

Full Changelog: v9.0.0...v10.0.0

v9.0.0

• Added stringify function for codegeneration
• Fixed precedences/binary edge-cases
• group, access operators maintain pair look in tree [], {}, ()
• justin has ..., ??, ?., ?.[, ??=, >>=, ||=, &&= operators
• misc minor fixes

Full Changelog: v8.0.0...v9.0.0

v8.0.0

What's Changed

• Pluggable language features
• Standardized common syntax
• Added assignment operators += -= *= /= %=
• Flatten code - no set, no wrappers
• Generic access node handling
• Simplified primitives wrapping [,true] vs ['',true]
• a?.valueOf?.() context calls support
• Misc. fixes

Full Changelog: v7.4.0...v8.0.0

7.4

• Fixed nary
• More complete tests
• Added skip argument to nary
• Better error display
• Type definitions
• Rassoc precedence is half, not full

Full Changelog: v7.4.4...v7.4.5

7.1

• Add explicit parse.unary, parse.binary and parse.nary registerers
• Add redefinable parse.id and parse.space

7.0

• Reintroduces AST/calltree as intermediary layer for better optimizations, extensibility and interop.
• Better registering fn.
• +10% parsing performance (170ms → 150ms)
• +20% eval performance (17ms → 13ms)
• +30% size (1kb → 1.3kb)

Full Changelog: v6.4.0...v7.0.0

6.1

• Collect & expose found arguments
• Better error messages
• Removed tagged literal

Full Changelog: v6.0.0...v6.1.0

6.0

What's Changed

• Direct evals as result of parsing.
• No lisp tree layer.
• Tokens and comments are parsed from lookup table.
• Single set method for defining operators or parsers.
• Postfix unaries are now custom parsers.
• Removed code, char functions.
• No fancy literal wrappers or string prefixes.
• Size -20% (2.5 → 2kb)
• Parsing perf +20% (200 → 160ms)
• Eval perf +50% (30 → 15ms)

Full Changelog: v5.5.2...v6.0.0

5.5

What's Changed

• ×3 faster eval due to flat reducer & fn type detection
• evaluate.operator is a function on par with parse.operator
• split core and subscript and justin configurators
• string, literal tokens are unary operators
• literals handling
• word operators are externalized
• more tests
• strings are prefixed with @ only, no "" tokens

Full Changelog: v5.0.0...v5.5.2