一篇文章弄懂javascript中的执行栈与执行上下文(2)

FunctionExectionContext = { LexicalEnvironment: { EnvironmentRecord: { type: 'Declarative', arguments: { 0: 20, 1: 30, length: 2 } }, outer: <GlobalLexicalEnvironment> }, VariableEnvironment: { EnvironmentRecord: { Type: "Declarative", g: undefined }, outer: <GlobalLexicalEnvironment>, }， thisBinding: <Global Object or undefined> }

之后执行上下文会进入执行阶段, 此时的函数上下文：

FunctionExectionContext = { LexicalEnvironment: { EnvironmentRecord: { type: 'Declarative', arguments: { 0: 20, 1: 30, length: 2 } }, outer: <GlobalLexicalEnvironment> }, VariableEnvironment: { EnvironmentRecord: { Type: "Declarative", g: 20 }, outer: <GlobalLexicalEnvironment>, }， thisBinding: <Global Object or undefined> }

当函数执行完毕后。会返回一个值并赋值给变量c，全局上下文被更新。更新完成后，代码执行完毕，程序结束。