Bumps terser from 4.6.3 to 4.8.1.
Sourced from terser's changelog.
- Security fix for RegExps that should not be evaluated (regexp DDOS)
- Support for numeric separators (
million = 1_000_000) was added.
- Assigning properties to a class is now assumed to be pure.
- Fixed bug where
yield wasn't considered a valid property key in generators.
- A bug was fixed where an arrow function would have the wrong size
arguments object is now considered safe to retrieve properties from (useful for
0) even when
pure_getters is not set.
- Fixed erroneous
const declarations without value (which is invalid) in some corner cases when using
- Fixed issue where ES5 object properties were being turned into ES6 object properties due to more lax unicode rules.
- Fixed parsing of BigInt with lowercase
e in them.
- Fixed subtree comparison code, making it see that
[1,[2, 3]] is different from
[1, 2, ]
- Printing of unicode identifiers has been improved
- Read unused classes' properties and method keys, to figure out if they use other variables.
- Prevent inlining into block scopes when there are name collisions
- Functions are no longer inlined into parameter defaults, because they live in their own special scope.
- When inlining identity functions, take into account the fact they may be used to drop
this in function calls.
- Nullish coalescing operator (
x ?? y), plus basic optimization for it.
- Template literals in binary expressions such as
+ have been further optimized
- Do not use reduce_vars when classes are present
- Check if block scopes actually exist in blocks
- Take into account "executed bits" of classes like static properties or computed keys, when checking if a class evaluation might throw or have side effects.
- Some new performance gains through a
AST_Node.size() method which measures a node's source code length without printing it to a string first.
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