typescript tutorial: comprehensive guide

PPTX 48 pages 374.1 KB Free download

48 pages

FaylHub.uz

Download via Telegram

Size 374.1 KB

File type PPTX

Pages 48

Updated Dec 2025

Page preview (5 pages)

Scroll down 👇

1 / 48

typescript tutorial: comprehensive guide 1. introduction to typescript what is typescript? typescript is a superset of javascript that adds static typing and other features to make large-scale applications more manageable. it compiles down to plain javascript, making it compatible with any browser or javascript runtime. why use typescript? static typing : catch errors during development rather than at runtime. enhanced tooling : better autocompletion, refactoring, and error detection in ides like vs code. scalability : ideal for large projects with complex codebases. compatibility : fully interoperable with existing javascript code. setting up typescript install node.js (if not already installed). install typescript globally: npm install -g typescript verify installation: tsc --version create a tsconfig.json file: tsc --init 2. basic concepts 2.1 variables and types declare variables with explicit types: let name: string = "alice"; let age: number = 25; let isstudent: boolean = true; type inference: let username = "bob"; // …

2 / 48

are ideal when you need a collection of items of the same type, especially when the size of the collection is not fixed. 2.3 tuples what are tuples? tuples are fixed-size arrays where each element has a specific type. unlike arrays, tuples enforce both the order and the type of elements. key characteristics fixed size : the length of a tuple is fixed at the time of declaration. example: let person: [string, number] = ["alice", 25]; here, person must always contain exactly two elements: a string followed by a number. specific types for each position : each position in a tuple has a specific type that cannot be changed. example: let coordinates: [number, number] = [10, 20]; coordinates[0] = 15; // valid coordinates[1] = "hello"; // error: type 'string' is not assignable to type 'number'. index-based access : like arrays, tuple elements are accessed using their index. example: let rgb: …

3 / 48

g, number] = ["alice", 25]; person[0] = "bob"; // valid person[1] = 30; // valid console.log(person); // output: ["bob", 30] // adding extra elements to a tuple is not allowed person.push("extra"); // allowed, but not recommended console.log(person); // output: ["bob", 30, "extra"] (not ideal) conclusion arrays are more flexible and suited for collections of items where the size and types may vary. tuples are stricter and better suited for small, fixed-size collections where the order and type of elements are important. 2.4 enums define a set of named constants: enum color { red, green, blue, } let favoritecolor: color = color.blue; 2.5 any and unknown any: allows any type (use sparingly): let randomvalue: any = 42; randomvalue = "hello"; unknown: safer alternative to any: let unknownvalue: unknown = 42; if (typeof unknownvalue === "number") { console.log(unknownvalue.tofixed(2)); } 3. functions 3.1 function declarations add types to parameters and return values: function …

4 / 48

5.1 class basics define classes with properties and methods: class person { name: string; age: number; constructor(name: string, age: number) { this.name = name; this.age = age; } greet(): string { return `hi, my name is ${this.name}`; } } 5.2 access modifiers use public, private, and protected: class car { private speed: number; constructor(speed: number) { this.speed = speed; } getspeed(): number { return this.speed; } } 5.3 inheritance extend classes: class animal { move(): void { console.log("moving..."); } } class dog extends animal { bark(): void { console.log("woof!"); } } 6. generics 6.1 generic functions create reusable functions with type parameters: function identity (arg: t): t { return arg; } const output = identity ("hello"); 6.2 generic classes define generic classes: class box { contents: t; constructor(value: t) { this.contents = value; } } const box = new box (42); 7. advanced topics 7.1 union and intersection types combine …

5 / 48

mple: class dog { bark(): void { console.log("woof!"); }} class cat { meow(): void { console.log("meow!"); }} function makesound(animal: dog | cat): void { if (animal instanceof dog) { animal.bark(); } else if (animal instanceof cat) { animal.meow();}} const mydog = new dog(); const mycat = new cat(); makesound(mydog); // output: woof! makesound(mycat); // output: meow! custom type guards : define custom logic to narrow types using functions that return a boolean. example: interface bird { type: "bird"; flyingspeed: number; } interface horse { type: "horse"; runningspeed: number; } type animal = bird | horse; function isbird(animal: animal): animal is bird { return (animal as bird).flyingspeed !== undefined; } function moveanimal(animal: animal): void { if (isbird(animal)) { console.log(`flying at speed: ${animal.flyingspeed}`); } else { console.log(`running at speed: ${animal.runningspeed}`); } } const eagle: bird = { type: "bird", flyingspeed: 50 }; const stallion: horse = { type: "horse", runningspeed: 30 }; …

Want to read more?

Download all 48 pages for free via Telegram.

Download full file

About "typescript tutorial: comprehensive guide"

typescript tutorial: comprehensive guide 1. introduction to typescript what is typescript? typescript is a superset of javascript that adds static typing and other features to make large-scale applications more manageable. it compiles down to plain javascript, making it compatible with any browser or javascript runtime. why use typescript? static typing : catch errors during development rather than at runtime. enhanced tooling : better autocompletion, refactoring, and error detection in ides like vs code. scalability : ideal for large projects with complex codebases. compatibility : fully interoperable with existing javascript code. setting up typescript install node.js (if not already installed). install typescript globally: npm install -g typescript verify installation: tsc --version cre...

This file contains 48 pages in PPTX format (374.1 KB). To download "typescript tutorial: comprehensive guide", click the Telegram button on the left.

Tags: typescript tutorial: comprehens… PPTX 48 pages Free download Telegram