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Opal v1.3.0 Release Notes

Release Date: 2021-10-27 // over 2 years ago

  • ➕ Added

    • ➕ Add support for retry (#2264)
    • Modernize Exceptions (#2264)
      • Add #cause, #backtrace_locations, #full_message to Exception
      • Normalize backtraces across platforms
      • Add Thread::Backtrace::Location
      • Output Exception#full_message on uncaught exceptions (#2269)
    • 👍 TracePoint :class support (#2049)
    • Implement the Flip-Flop operators (#2261)
    • ➕ Add JS[] to access properties on the global object (#2259)
    • ➕ Add ENV.fetch to the Nodejs implementation of ENV (#2259)
    • 0️⃣ Opal::Cache, an optional compiler cache (enabled by default) (#2242, #2278, #2329)
    • Alias for gvars, alias on main (#2270)
    • 👌 Support for GJS (GNOME's JavaScript runtime) runner (#2280)
    • 👍 Scope variables support for eval() (#2256)
    • ➕ Add support for Kernel#binding (#2256)
    • 👍 A (mostly) correct support for refinements (#2256)
    • ➕ Add support for ECMAScript modules with an --esm CLI option (#2286)
    • 👍 Implement Regexp#names and add named captures support (#2272)
    • REPL improvements: (#2285)
      • Colored output & history support
      • ls to show available constants and variable
    • ➕ Add Method#=== as an alias to Method#call, works the same as Proc#=== (#2305)
    • ➕ Add IO#gets and IO#read_proc along with other supporting methods (#2309)
      • Support #gets on most platforms, including browsers (via prompt)
      • Move the REPL to a --repl CLI option of the main executable
      • Completely refactor IO, now supporting methods like #each_line throughout the entire IO chain
      • Add a runner for MiniRacer (as miniracer)
      • Support Windows on the Chrome runner
      • Support Windows on the REPL
      • Platforms an IO implementations should either set IO#read_proc or overwrite IO#sysread
    • 👍 [experimental] Add support for JavaScript async/await (#2221)
      • Enable the feature by adding a magic comment: # await: true
      • The magic comment can be also used to mark specific method patterns to be awaited (e.g. # await: *_await, sleep will make any method ending in _await or named sleep to be awaited)
      • Add Kernel#__await__ as a bridge to the await keyword (inspired by CoffeeScript await support)
      • Require opal/await to get additional support
      • Read more on the newly added documentation page
    • 👍 Better interoperability between legacy Promise (v1) and native Promise (v2) (#2221)
      • Add PromiseV1 as an alias to the original (legacy) Promise class
      • Add #to_v1 and #to_v2 to both classes
      • Promise#to_n will convert it to a native Promise (v2)
    • ➕ Add Opal::Config.esm to enable/disable ES modules (#2316)
      • If Config.esm is enabled, SimpleServer does type="module"
      • Add new rack-esm example
    • ➕ Add a QuickJS (https://bellard.org/quickjs/) runner (#2331)
    • ➕ Add IO#fileno, Method#curry, Buffer#to_s, Pathname.pwd (#2332)
    • Add NodeJS support for ARGF, ENV.{inspect,to_h,to_hash,merge}, File.{delete,unlink}, Kernel#system, Kernel#`, Process::Status (#2332)
    • Introduce __dir__ support (#2323)
    • 👍 Full autoload support (#2323)
      • Now compatible with opal-zeitwerk and isomorfeus
      • Allow toplevel autoloads
      • Allow dynamic autoloads (e.g. can be hooked to fetch a URL upon autoload with a custom loader)
      • Allow overwriting require (e.g. like rubygems does)
      • Allow autoloading trees with require_tree "./foo", autoload: true
      • Add Module#autoload?
    • Autoload parts of the corelib (#2323)

    🛠 Fixed

    • 🛠 Fixed multiple line Regexp literal to not generate invalid syntax as JavaScript (#1616)
    • 🛠 Fix Kernel#{throw,catch} along with UncaughtThrowError (#2264)
    • ⚡️ Update source-map-support to fix an off-by-one error (#2264)
    • Source map: lines should start from 1, not 0 (#2273)
    • 👍 Allow for multiple underscored args with the same name in strict mode (#2292)
    • 👉 Show instance variables in Kernel#inspect (#2285)
    • 0.digits was returning an empty array in strict mode (#2301)
    • Non Integer numbers were responding to #digits (#2301)
    • Correctly delete hash members when dealing with boxed strings (#2306)
    • Escape string components in interpolated strings (dstrs) correctly (#2308)
    • Don't try to return the JS debugger statement, just return nil (#2307)
    • Retain the - while stringifying -0.0 (#2304)
    • 🛠 Fix super support for rest args and re-assignments with implicit arguments (#2315)
    • 🛠 Fix calling Regexp#last_match when $~ is nil (#2328)
    • 🏁 Windows support for chrome runner (#2324)
      • Use correct node separator for NODE_PATH on Windows
      • Pass dir and emulate exec a bit on Windows
      • Use Gem.win_platform?, match supported platform to ruby, simplify run
    • NodeJS: Drop the first -- argument in ARGV (#2332)
    • 🛠 Fix Object#require not pointing to Kernel#require (#2323)

    🔄 Changed

    • Fast-track bad constant names passed to Struct.new (#2259)
    • 📇 Renamed internal super related helpers, find_super_dispatcher is now find_super, find_iter_super_dispatcher is now find_block_super (#2090)
    • The opal-repl CLI now requires files to be passed with --require (or -r) instead of the bare filename (#2309)
    • Process is now a Module, not a Class - just like in MRI (#2332)
    • s = StringIO.new("a"); s << "b"; s.string now returns "b", like MRI, but Opal used to return "ab" (#2309)

    Internal

    • 👕 Switch from jshint to ESLint (#2289)
    • Switch from UglifyJS to Terser (#2318)
    • 🐎 [CI] Performance regression check (#2276, #2282)