One article makes you understand what typescript is

Bloggers recently entered typescript Learning from , So create a column , Share with you what you are learning ts Some knowledge summary and some own feelings ：
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TypeScript What is it?

TypeScript brief introduction

1. TypeScript yes JavaScript Superset .
2. It's right JS It has been extended , towards JS The concept of type is introduced in , And added many new features .
3. TS The code needs to be compiled into JS, And then to JS The parser executes .
4. TS Fully compatible with JS, In other words , Any JS Code can be used directly as JS Use .
5. Compare with JS for ,TS With static types , More strict grammar , More powerful features ;TS You can check your code before it executes , Reduces the probability of runtime exceptions ;TS The code can be compiled into any version of JS Code , It can effectively solve different problems JS Compatibility of operating environment ; Same function ,TS The amount of code is greater than JS, But because of TS The code structure of is clearer , Variable types are more explicit , In later code maintenance TS But far better than JS.

TypeScript What's added ?

TypeScript Development environment construction

1. download Node.js

You can go node.js Download on node.js ==> node.js Official website

2. install Node.js

3. Use npm Global installation typescript

   1.  Go to the command line 
   2.  Input ：npm i -g typescript
   

4. Create a ts file
   
   

5. Use tsc Yes ts File for compilation

    1.  Go to the command line 	
    2.  Get into ts File directory 
    3.  Carry out orders ：tsc xxx.ts
   

Here we can find , We have already ts The file is compiled , Automatically generated ts file

Summary

I'm concerned about ts The understanding of ,ts In fact, it is a strict version js, In our daily development ,js Although the code is easy to write , But the code is not rigorous ,ts It's a good solution to this problem , This is only the first article , I believe many friends are right ts The benefits of are not fully understood , Follow my column , Slowly let everyone be right ts Have a deeper insight .