Hi, I'm from the front , Today, I would like to share with you ！
This article mainly introduces what is typeScript ? typeScript And javaScript What does it matter ？ Why should we study typeScript ?
One 、 What is? typeScript ?
typeScript By Mircrosoft stay 2012 , launched in , Is a free and open source programming language . It is javaScript A strict superset of , And added optional static and class based object-oriented programming , Is a very popular language extension .
typeScript Often referred to as TS .typeScript Not only can they support javaScript and ES grammar , Can also support typeScript grammar , Finally compiled as javaScript perform .
Its characteristics ：
- Began in JS , belong to JS.
- Powerful type system .
- advanced javaScript .
Two 、typeScript And javaScript Relationship
typeScript yes javaScript Superset , It's a door built on javaScript Language based on . stay typeScript Can be used in javaScript Extended syntax beyond , At the same time with the help of typeScript Good support for object-oriented and static types , You can write more robust 、 Large projects with greater maintainability .
typeScript No javaScript substitute , It will make javaScript The pace of progress is more solid , More distant .
typeScript Provides static code analysis , It can intelligently prompt error messages before the code runs ,javaScript It's a weakly typed language , For reporting errors js Still able to compile successfully , An error will be reported only after running . comparison javaScript ,typeScript More efficient .
3、 ... and 、 Why should we study typeScript
typeScript The purpose of the design is to solve javaScript The pain points ：javaScript Is a weak type and has no namespace , So lead to javaScript It's hard to modularize , Not suitable for large projects .
So far , The popular Vue、React、Angular All in use typeScript Development , Even Hongmeng's 3.0 It is also recommended to use javaScript Development and application , The latest development framework ArkUI Also fully embraced typeScript.
stay npm Upper typeScript Downloads double every year , end 2021 year 12 month 31 Japan , Its downloads have exceeded 2200 Ten thousand times .
We found that ,JavaScript Always first ,Python and Java Second and third, respectively , A firm position .
It is worth noting that TypeScript The heat soared all the way , Now we have arrived at Fourth place . I predict the future typeScript As the front-end, the knowledge reserve will become necessary , So start learning now ！
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