Some basic features of typescript

// Ts yes js Superset Ts The interior contains js All syntax in But it extends the syntax checking and typing mechanism
// To optimize js Disadvantages of incomplete type checking
// TS It belongs to static programming language JS It's a dynamic programming language
// TS coordination VSCODE Syntax pre compilation checks can be performed

TS: let a:number = 200;  JS-ES6: let a = 300;  JS: var a = 300;

// install ts Precompiler mode npm install -g typescript
// TSC The order is TS Default instructions for precompiler
// TSC-v Check the software version