diff --git a/intro-to-typescript/README.md b/intro-to-typescript/README.md new file mode 100644 index 0000000..1831f60 --- /dev/null +++ b/intro-to-typescript/README.md @@ -0,0 +1,40 @@ +# Typescript Basics + - JavaScript - managed by VOLUNTEERS + - TypeScript enforces a structure to JavaScript + - Microsoft released in Oct 2012 + - Superset of JavaScript + - ECMAScript supports TypeScript, formalized im 2015 + - Transpile as opposed to compile + + # Features + - Interfaces + - Namespaces + - Generics + - Abstract classes + - Data modifiers + - Decorators - Not available on all browsers + - Readonly keyword + - Type utils + - Optionals + - Function overloading + +# TypeScript Types + - Primitive + - User Defined types + - Others are unknown, tuple + +# Get started - Commands tested on Apple Mac M1 +```node + npm install typescript + npx tsc -version + + //Transpile into javascript + npx tsc ss.ts + + //Run javascript file + npx node ss + + //get tsconfig.json + npx tsc --init +``` + diff --git a/intro-to-typescript/dist/sample.js b/intro-to-typescript/dist/sample.js new file mode 100644 index 0000000..6dff545 --- /dev/null +++ b/intro-to-typescript/dist/sample.js @@ -0,0 +1,18 @@ +"use strict"; +const ab = { + name: "test", + salary: 30, + committees: [3, "H&S", "Philanthropy"] +}; +console.log(ab.name); +//ab.committees[0]= "Test"; //Error outs +//ab.committees.push("","",""); //will pass +ab.committees[0] = 3; +const someFunction = function (aParameter) { + if (typeof aParameter == 'number') { + aParameter = aParameter * aParameter; + } + console.log(aParameter); +}; +someFunction("test"); +someFunction(2.0); diff --git a/intro-to-typescript/dist/ss.js b/intro-to-typescript/dist/ss.js new file mode 100644 index 0000000..0403819 --- /dev/null +++ b/intro-to-typescript/dist/ss.js @@ -0,0 +1,4 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +let greeting = "Hello from Skillsoft"; +console.log(greeting); diff --git a/intro-to-typescript/package-lock.json b/intro-to-typescript/package-lock.json new file mode 100644 index 0000000..1c3df2e --- /dev/null +++ b/intro-to-typescript/package-lock.json @@ -0,0 +1,24 @@ +{ + "name": "intro-to-typeScript", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "dependencies": { + "typescript": "^5.2.2" + } + }, + "node_modules/typescript": { + "version": "5.2.2", + "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.2.2.tgz", + "integrity": "sha512-mI4WrpHsbCIcwT9cF4FZvr80QUeKvsUsUvKDoR+X/7XHQH98xYD8YHZg7ANtz2GtZt/CBq2QJ0thkGJMHfqc1w==", + "bin": { + "tsc": "bin/tsc", + "tsserver": "bin/tsserver" + }, + "engines": { + "node": ">=14.17" + } + } + } +} diff --git a/intro-to-typescript/package.json b/intro-to-typescript/package.json new file mode 100644 index 0000000..9b3b832 --- /dev/null +++ b/intro-to-typescript/package.json @@ -0,0 +1,5 @@ +{ + "dependencies": { + "typescript": "^5.2.2" + } +} diff --git a/intro-to-typescript/src/sample.ts b/intro-to-typescript/src/sample.ts new file mode 100644 index 0000000..efd66b3 --- /dev/null +++ b/intro-to-typescript/src/sample.ts @@ -0,0 +1,28 @@ +interface Employee { + name: string; + salary: number; + committees:[number,string, string]; +} + +const ab: Employee = { + name:"test", + salary:30, + committees:[3,"H&S","Philanthropy"] +} + +console.log(ab.name); +//ab.committees[0]= "Test"; //Error outs +//ab.committees.push("","",""); //will pass +ab.committees[0]= 3; + + +type someValue = string | number; +const someFunction = function (aParameter: someValue){ + if(typeof aParameter == 'number'){ + aParameter = aParameter*aParameter; + } + console.log(aParameter); +}; + +someFunction("test"); +someFunction(2.0); diff --git a/intro-to-typescript/src/ss.ts b/intro-to-typescript/src/ss.ts new file mode 100644 index 0000000..ae933ae --- /dev/null +++ b/intro-to-typescript/src/ss.ts @@ -0,0 +1,3 @@ +let greeting: string = "Hello from Skillsoft"; +console.log(greeting); +export {}; diff --git a/intro-to-typescript/tsconfig.json b/intro-to-typescript/tsconfig.json new file mode 100644 index 0000000..a645c5b --- /dev/null +++ b/intro-to-typescript/tsconfig.json @@ -0,0 +1,109 @@ +{ + "compilerOptions": { + /* Visit https://aka.ms/tsconfig to read more about this file */ + + /* Projects */ + // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ + // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ + // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ + // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ + // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ + // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ + + /* Language and Environment */ + "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ + // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ + // "jsx": "preserve", /* Specify what JSX code is generated. */ + // "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */ + // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ + // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ + // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ + // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ + // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ + // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ + // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ + // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ + + /* Modules */ + "module": "commonjs", /* Specify what module code is generated. */ + "rootDir": "./src", /* Specify the root folder within your source files. */ + // "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */ + // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ + // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ + // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ + // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ + // "types": [], /* Specify type package names to be included without being referenced in a source file. */ + // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ + // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ + // "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */ + // "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */ + // "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */ + // "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */ + // "resolveJsonModule": true, /* Enable importing .json files. */ + // "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */ + // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ + + /* JavaScript Support */ + // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ + // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ + // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ + + /* Emit */ + // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ + // "declarationMap": true, /* Create sourcemaps for d.ts files. */ + // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ + // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ + // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ + // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ + "outDir": "./dist", /* Specify an output folder for all emitted files. */ + // "removeComments": true, /* Disable emitting comments. */ + // "noEmit": true, /* Disable emitting files from a compilation. */ + // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ + // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ + // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ + // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ + // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ + // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ + // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ + // "newLine": "crlf", /* Set the newline character for emitting files. */ + // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ + // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ + // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ + // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ + // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ + // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ + + /* Interop Constraints */ + // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ + // "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */ + // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ + "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ + // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ + "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ + + /* Type Checking */ + "strict": true, /* Enable all strict type-checking options. */ + // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ + // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ + // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ + // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ + // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ + // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ + // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ + // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ + // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ + // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ + // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ + // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ + // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ + // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ + // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ + // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ + // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ + // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ + + /* Completeness */ + // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ + "skipLibCheck": true /* Skip type checking all .d.ts files. */ + } +}