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babel 源码浅析

Glossary

preser

plugin

@babel-core

types

tarverse

parser

大纲

ast

parser

acorn

traverse

preset

preset-env

useBuiltin

根据 UA 过滤属性

执行转换的关键代码

trasnformFile/index.js

@preset-env 自带的特性检测插件

@preset-env/use-built-ins-plugin

// traverse.visitors.merge 将多个 visitor 合并在一起,同时注入 state

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a simple doc about babel

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