https://evilrecluse.top/post/7389a59f/
Binding
对象用于存储 绑定 的信息
这个对象会作为Scope
对象的一个属性存在
同一个作用域可以包含多个 Binding
你可以在 @babel/traverse/lib/scope/binding.js
中查看到它的定义
const parser = require("@babel/parser"); const traverse = require("@babel/traverse").default; const jscode = ` function a(){ var a = 1; a = a + 1; return a; } function b(){ var b = 1; var c = 2; b = b - c; return b; } `; let ast = parser.parse(jscode); const visitor = { BlockStatement(path){ console.log("\n此块节点源码:\n", path.toString()) console.log('----------------------------------------') var bindings = path.scope.bindings console.log('作用域内 被绑定量 数量:', Object.keys(bindings).length) for(var binding_ in bindings){ console.log('名字:', binding_) binding_ = bindings[binding_]; console.log('类型:', binding_.kind) console.log('定义:', binding_.identifier) console.log('是否会被修改:', binding_.constant) console.log('被修改信息信息记录', binding_.constantViolations) console.log('是否会被引用:', binding_.referenced) console.log('被引用次数', binding_.references) console.log('被引用信息NodePath记录', binding_.referencePaths) } } } traverse(ast, visitor); // let { code } = generator(ast); // console.log(code);