回复内容：
nodejs开发的操作系统Node OS
js开发桌面级应用程序,听朋友说win10支持js开发桌面级应用？nwjs/nw.js · GitHub
感觉js学一段时间自然会对node感兴趣，然后就是无尽的大坑...
难道不是在页面里自己写个chrome然后轻松解决一切兼容问题么？
大概是给 ES5/6 写 Small Step Semantics 吧。下面是变量赋值的，使用 CEK 范式
- Setv-right:
![\cfrac{\mathrm{ident}\ u}{[\mathrm{setv}\ u\ c_2, e, s, k, t] \rightarrow [c_2, e, s, (\mathrm{setv}\ u\ \square)\gg=k, t]}](//zhihu.com/equation?tex=%5Ccfrac%7B%5Cmathrm%7Bident%7D%5C+u%7D%7B%5B%5Cmathrm%7Bsetv%7D%5C+u%5C+c_2%2C+e%2C+s%2C+k%2C+t%5D+%5Crightarrow+%5Bc_2%2C+e%2C+s%2C+%28%5Cmathrm%7Bsetv%7D%5C+u%5C+%5Csquare%29%5Cgg%3Dk%2C+t%5D%7D)
- Setv-declared:
![\cfrac{\mathrm{ident}\ u\qquad\mathrm{declared*}\ e\ u}{[\mathrm{just}\ x, e, s, (\mathrm{setv}\ u\ \square)\gg= k, t] \rightarrow [\mathrm{just}\ x, e, s[(e\ u)=x], k, t]}](//zhihu.com/equation?tex=%5Ccfrac%7B%5Cmathrm%7Bident%7D%5C+u%5Cqquad%5Cmathrm%7Bdeclared%2A%7D%5C+e%5C+u%7D%7B%5B%5Cmathrm%7Bjust%7D%5C+x%2C+e%2C+s%2C+%28%5Cmathrm%7Bsetv%7D%5C+u%5C+%5Csquare%29%5Cgg%3D+k%2C+t%5D+%5Crightarrow+%5B%5Cmathrm%7Bjust%7D%5C+x%2C+e%2C+s%5B%28e%5C+u%29%3Dx%5D%2C+k%2C+t%5D%7D)
- Setv-undeclared-notstrict:
![\cfrac{\mathrm{ident}\ u\qquad\neg\mathrm{declared*}\ e\ u\qquad\neg\mathrm{strict}\ e\qquad e' = \mathrm{addglobalslot}\ e\ u}{[\mathrm{just}\ x, e, s, (\mathrm{setv}\ u\ \square)\gg= k, t] \rightarrow [\mathrm{just}\ x, e', s[(e'\ u)=x], k, t]}](//zhihu.com/equation?tex=%5Ccfrac%7B%5Cmathrm%7Bident%7D%5C+u%5Cqquad%5Cneg%5Cmathrm%7Bdeclared%2A%7D%5C+e%5C+u%5Cqquad%5Cneg%5Cmathrm%7Bstrict%7D%5C+e%5Cqquad+e%27+%3D+%5Cmathrm%7Baddglobalslot%7D%5C+e%5C+u%7D%7B%5B%5Cmathrm%7Bjust%7D%5C+x%2C+e%2C+s%2C+%28%5Cmathrm%7Bsetv%7D%5C+u%5C+%5Csquare%29%5Cgg%3D+k%2C+t%5D+%5Crightarrow+%5B%5Cmathrm%7Bjust%7D%5C+x%2C+e%27%2C+s%5B%28e%27%5C++u%29%3Dx%5D%2C+k%2C+t%5D%7D)
- Setv-undefined-strict:
![\cfrac{\mathrm{ident}\ u\qquad\neg\mathrm{declared*}\ e\ u\qquad\mathrm{strict}\ e}{[\mathrm{just}\ x, e, s, (\mathrm{setv}\ u\ \square)\gg= k, t] \rightarrow [\text{throw ``Undeclared Variable''}, e, s, k, t]}](//zhihu.com/equation?tex=%5Ccfrac%7B%5Cmathrm%7Bident%7D%5C+u%5Cqquad%5Cneg%5Cmathrm%7Bdeclared%2A%7D%5C+e%5C+u%5Cqquad%5Cmathrm%7Bstrict%7D%5C+e%7D%7B%5B%5Cmathrm%7Bjust%7D%5C+x%2C+e%2C+s%2C+%28%5Cmathrm%7Bsetv%7D%5C+u%5C+%5Csquare%29%5Cgg%3D+k%2C+t%5D+%5Crightarrow+%5B%5Ctext%7Bthrow+%60%60Undeclared+Variable%27%27%7D%2C+e%2C+s%2C+k%2C+t%5D%7D)
产生了这样一种冲动：
使用 JavaScript
在页面内实现一个渲染引擎，完整具备HTML，CSS，JavaScript的语义。
使用 JavaScript
在页面内实现一个浏览器，可进行多页面浏览以及各种选项配置功能。
使用 JavaScript
在页面内实现一个操作系统，操作系统内部又可以安装浏览器。
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
