Closure Compiler v20211107 released

[Laura Harker]

Downloads:
Maven: http://search.maven.org/#search%7Cga%7C1%7Ca%3A%22closure-compiler%22
NPM: https://www.npmjs.com/package/google-closure-compiler

Release Notes:
https://github.com/google/closure-compiler/wiki/Releases

November 7, 2021 (v20211107)

• ECMASCRIPT_NEXT is now the default language out. This makes it so that folks need to explicitly ask for transpilation by setting the --language_out flag. For folks who want the old behavior, you can continue to get it by setting --language_OUT=ECMASCRIPT5 or --language_out=STABLE. Note that in order to maintain the default behavior of not including the "use strict" directive the --emit_use_strict flag now defaults to false.
• Fix incorrect ordering of side-effects when an function inlining target was part of a call target expression.
• Making ConvertToDottedProperties convert computed properties, member functions, and optional chaining with brackets.
• Change to allow Collapse Properties to collapse properties of functions used in call target indirection (i.e. (0,qualified.name.fn)()). This addresses a code size regression seen with TypeScript 4.4 generated code.
• Fixed regression that caused a crash when setting chunk_output_type to ES_MODULES
• Fix incorrect documentation of "print_file_after_each_pass" and "print_module_after_each_file" flag.
• Stop rewriting async super.function() calls with Object.getPrototypeOf. This is in effect a rollback of the functional change in https://github.com/google/closure-compiler/pull/3103 Preserving the super.function() syntax is more spec-compliant in some cases, and MS Edge 17 is incredibly rare these days.
• Transpile Rest Arguments using a helper function to allow them to be removed as dead code.
• Do not mark indirect call targets for tagged template literals as useless code. Indirecting calls in the form (0, prefix.myFn)abc` prevents passing prefix as the this context object to myFn, which is useful. This fixes a dead code removal with TypeScript 4.4, which uses this pattern for functions imported from modules.
• When the special first parameter is unused, convert all tagged template literal references into ordinary function calls. This allows for debugging or logging functions intended to be called with tagged template literals that do nothing when compiled for production to be recognized and removed.
• Fix to the problem where CodePrinter omits required parens around arrow functions in some contexts.
• The zero, comma pattern introduced in TS4.4 is recognized in goog.testSuite calls. (e.g. (0, goog.testSuite)({});)
• Errors for overriding a @final method may no longer be suppressed via @suppress {const} or @suppress {constantProperty}. The canonical way is @suppress {visibility}.