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Introduction to DeNO
2022-07-06 03:19:00 【phial03】
- deno Official website :https://deno.land/
- deno Chinese Translation Network :https://deno-cn.vercel.app/
What is? Deno?
Node.Js author Ryan Dahl stay 2018 year 8 month 23 Japan released the first version of v0.1.0 Of deno, Why? Ryan Dahl To change your life and create a new runtime ?
- Too many and incompatible module import rules :ES modular 、CommonJs…
- node_modules Black holes
- Yes callback ES5、Promise ES6 and async/await( be based on Promise)ES7 Two ways of writing
- Too many tools (webpack、vite、babel、tsc…)
- Ruan Yifeng is right deno Explanation :deno Explain
Learning cost
Study deno More concerned must be language ,deno Our position is still runtime Runtime , But in particular, it is Typescript、JavaScript Runtime , That is, it can run directly Typescript( The internal will, however ts Translate it into js) and Javascript
So using node My classmates can ECMAscript Grammatically seamlessly migrate to node
Learn something :
deno Tool command : Because there is no npm, Package management is deno Helping us
deno Some special case Syntax : Because the best use promise structure , less .
for await(const conn of listener) {
// ...
}
- Work : because deno only v1.18.2 edition , You can't find it if you want to try deno Related development
If you're looking for a job , It's better to learn node, To engage in enterprise level micro service development, we must learn Typescript, At present, very thoughtful frameworks are being used , Such as support Ioc DI、Aop… Framework midwayjs、nestjs、darukjs、malagujs, If you like it very much serverless Recommended malagujs
The enterprise level framework is deno Doesn't exist in ? There is , Look at ecology
ecology
At present, high-quality deno library :https://github.com/hylerrix/awesome-deno-cn
Support deno The source of discovery ( I'm not sure. It must be deno Of , It also supports node):https://www.skypack.dev/
The official discovery source ( Certain support deno):https://deno.land/x
Think about it :node Capable web application 、 structure vue、react Project tools
web Application Library / frame :
Imitation koa Of :https://github.com/ako-deno/ako
Imitation express Of :https://github.com/cmorten/opine
suffer nest Enlightening typescript library ( In development …):https://github.com/SampaioLeal/destjsBuild a library of front-end projects / frame :
suffer next.js(react) Enlightening SSR frame :https://alephjs.org/docs
stay deno Build running under Vue2/3 Tools for :https://github.com/mggower/vno
Why? nest We are not going to migrate to deno?
Officials are going to see deno Make plans for the development of issue:https://github.com/nestjs/nest/issues/4495
Original words :“Deno Not mature enough , You can't even try to NestJS Transplant to it . I suggest we first look at “ smaller ” Of Node.js Project how it develops with —— Whether they are transplanted or rewritten . According to the trend set by the community and “ standard ”, We will consider working with NestJS Move together .”
deno With Compat Mode compatible node.js, But not supported typescript,issue:https://github.com/nestjs/nest/issues/8867
Because compatibility does not support typescript, That's equivalent to writing the project well and using deno run , It doesn't make much sense
- Thoughts and feelings
What we need most now is to settle down and use typescript and node Write some tools , For example, some Vue、React、Nestjs Use the scaffold template to seal the scaffold .
as for deno If it gets better and better with its ecology , It's not too late to get to know him and use it ,deno To be honest, there are still many ways to go , Because it just came out, so many serverless Is not supported , Unless you customize deno Environmental Science , At present, there is basically no work , And enterprise level framework deno It's not perfect .
Generally speaking, at present deno There is no overwhelming reason for me to use , Instead, it brings me some shortcomings , Such as : ecology , No resources npm Clear central source, etc ,deno A small dinosaur in a developing stage , I hope one day , You can also experience its style in the enterprise .
deno analysis :
We don't need deno:https://segmentfault.com/a/1190000040122104deno course :
Deno Introduction Manual :
https://chinese.freecodecamp.org/news/the-deno-handbook-with-examples/great Deno Introduction and actual combat :
https://juejin.cn/post/6844904162321252360Asynchronous function in deno Timeout in :
https://medium.com/deno-the-complete-reference/timeout-for-async-functions-in-deno-52cee16e6e92
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