what is typescript in angular

1      
2        content_copy
3      
4      {
5  "compileOnSave": false,
6  "compilerOptions": {
7    "baseUrl": "./",
8    "outDir": "./dist/out-tsc",
9    "sourceMap": true,
10    "declaration": false,
11    "downlevelIteration": true,
12    "experimentalDecorators": true,
13    "moduleResolution": "node",
14    "importHelpers": true,
15    "target": "es2015",
16    "module": "es2020",
17    "lib": [
18      "es2018",
19      "dom"
20    ]
21  }
22}
23    

1      
2        content_copy
3      
4      "lib": [
5  "es2018",
6  "dom"
7]
8