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add babel-plugin-transform-block-scoping #30807

Merged
merged 3 commits into from
Oct 22, 2020
Merged

add babel-plugin-transform-block-scoping #30807

merged 3 commits into from
Oct 22, 2020

Commits on Oct 21, 2020

  1. add babel-plugin-transform-block-scoping 

    A discussion in evanw/esbuild#478 has shown
that using let and class in same enclosing level has a signigicant
performance impact on the Safari browser. To alleviate this problem we
transform the let and class constructs into var when it is 'easily'
possible.

Co-authored-by: Justin Ridgewell <jridgewell@google.com>
Co-authored-by: erwin mombay <erwinm@google.com>
    @erwinmombay @jridgewell
    erwinmombay and jridgewell committed Oct 21, 2020
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  2. turn on mangle on terser

    @erwinmombay
    erwinmombay committed Oct 21, 2020
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  3. Comments and test cases

    @jridgewell
    jridgewell committed Oct 21, 2020
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