JavaScript核心概念执行上下文栈的相关内容

文章 2022-11-09 来自：开发者社区

JavaScript核心概念之执行上下文和栈

现在想改变一下写作方式，以问答的形式来讲解这些枯燥无味的知识，尽量把每一个为什么都讲透，每个知识点都不迷惑。桃翁桃翁，问个问题呢，据说 js 里面有个执行上下文，这个概念是个什么东东哦？据说挺重要的，给我科普科普呗。Emm… 这个概念非常的抽象，简单来说呢，就是 JS 在执行某段代码的时候做的一些事情。具体做的事情就是定义了变量或函数有权访问的其他数据决定了它们各自的行为(作用域链)。每个执行环....

文章 2018-09-25 来自：开发者社区

JavaScript核心概念之执行上下文和栈

现在想改变一下写作方式，以问答的形式来讲解这些枯燥无味的知识，尽量把每一个为什么都讲透，每个知识点都不迷惑。桃翁桃翁，问个问题呢，据说 js 里面有个执行上下文，这个概念是个什么东东哦？据说挺重要的，给我科普科普呗。 Emm… 这个概念非常的抽象，简单来说呢，就是 JS 在执行某段代码的时候做的一些事情。具体做的事情就是定义了变量或函数有权访问的其他数据决定了它们各自的行为(作用域链)。每个....

共有2条

< 1 >

跳转至： GO

更新时间 2022-11-10 09:51:02

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面下方点击"联系我们"与我们沟通。

JavaScript更多执行上下文相关

JavaScript您可能感兴趣

产品推荐

{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"iconImg":"https://img.alicdn.com/tfs/TB1JWN9qggP7K4jSZFqXXamhVXa-200-200.png","ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","title":"Node.js 性能平台","des":"Node.js 性能平台（Node.js Performance Platform）是面向中大型 Node.js 应用提供 性能监控、安全提醒、故障排查、性能优化等服务的整体性解决方案。提供完善的工具链和服务，协助客户主动、快速发现和定位线上问题。","btn1":"申请开通","link1":"https://common-buy.aliyun.com/?spm=5176.179584.935956.btn1.6bd0276eYr3tGs&commodityCode=npp#/open","contentLink":"https://www.aliyun.com/product/nodejs","btn2":"产品文档","link2":"https://help.aliyun.com/product/60298.html?spm=5176.179584.935956.btn2.6bd0276eYr3tGs","infoGroup":[{"infoName":"入门指导","infoContent":{"firstContentName":"产品快速入门","firstContentLink":"https://help.aliyun.com/knowledge_detail/60338.html?spm=5176.179584.935963.2.6bd0276eYr3tGs","lastContentName":"常见问题","lastContentLink":"https://help.aliyun.com/knowledge_detail/60418.html?spm=5176.179584.935963.3.6bd0276eYr3tGs"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"内存泄露案例","firstContentLink":"https://help.aliyun.com/document_detail/64011.html?spm=a2c4g.11174283.6.570.159030b1bBdKke"}},{"infoName":"产品动态","infoContent":{"firstContentName":"产品最新动态","firstContentLink":"https://www.aliyun.com/product/news?spm=5176.179584.1266814.211view.6bd0276eYr3tGs&category=233&product=261"}}],"btn3":""}],"card":[],"search":[],"infoCard":[],"title":{"mainTitle":"mPaaS","subtitle":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","linkUrl":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"iconImg":"https://img.alicdn.com/tfs/TB1JWN9qggP7K4jSZFqXXamhVXa-200-200.png","ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","title":"Node.js 性能平台","des":"Node.js 性能平台（Node.js Performance Platform）是面向中大型 Node.js 应用提供 性能监控、安全提醒、故障排查、性能优化等服务的整体性解决方案。提供完善的工具链和服务，协助客户主动、快速发现和定位线上问题。","btn1":"申请开通","link1":"https://common-buy.aliyun.com/?spm=5176.179584.935956.btn1.6bd0276eYr3tGs&commodityCode=npp#/open","contentLink":"https://www.aliyun.com/product/nodejs","btn2":"产品文档","link2":"https://help.aliyun.com/product/60298.html?spm=5176.179584.935956.btn2.6bd0276eYr3tGs","infoGroup":[{"infoName":"入门指导","infoContent":{"firstContentName":"产品快速入门","firstContentLink":"https://help.aliyun.com/knowledge_detail/60338.html?spm=5176.179584.935963.2.6bd0276eYr3tGs","lastContentName":"常见问题","lastContentLink":"https://help.aliyun.com/knowledge_detail/60418.html?spm=5176.179584.935963.3.6bd0276eYr3tGs"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"内存泄露案例","firstContentLink":"https://help.aliyun.com/document_detail/64011.html?spm=a2c4g.11174283.6.570.159030b1bBdKke"}},{"infoName":"产品动态","infoContent":{"firstContentName":"产品最新动态","firstContentLink":"https://www.aliyun.com/product/news?spm=5176.179584.1266814.211view.6bd0276eYr3tGs&category=233&product=261"}}],"btn3":""}],"card":[],"search":[],"infoCard":[],"title":{"mainTitle":"mPaaS","subtitle":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","linkUrl":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}}