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August 31, 2024 17:16
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| /*** ES6 Features ***/ | |
| // Let and Const | |
| let variableName = "value"; // Block-scoped, can be reassigned | |
| const constantName = "value"; // Block-scoped, cannot be reassigned | |
| // Arrow Functions | |
| const myFunction = (param) => { | |
| return param * 2; | |
| } | |
| // Template Literals | |
| const greeting = `Hello, $(name)!` // Embedded expressions | |
| // Destructuring Assignment | |
| const { a, b} = obj; // Extracts properties from an object | |
| const [x, y] = array; // Extracts values from an array | |
| // Spread and Rest Operator | |
| const newArray = [...arrayl, ...array2]; // Combines arrays | |
| const newObj = {...obj1, ...obj2 }; // Combines objects | |
| function sum(...numbers) { | |
| return numbers.reduce((acc, curr) => acc + curr, 0); // Rest parameter | |
| } | |
| // Default Parameters | |
| function multiply(a, b = 1){ | |
| return a * b; | |
| } | |
| // Promises | |
| const promise = new Promise((resolve, reject) => { | |
| if (success) { | |
| resolve ("Success!"); | |
| } else { | |
| reject ("Failure!"); | |
| } | |
| }); | |
| promise | |
| •then ((response) => console. log(response)) | |
| •catch((error) =› console. log(error)); | |
| // Classes | |
| class Animal { | |
| constructor (name) { | |
| this.name = name; | |
| } | |
| speak() { | |
| console.log(`${this.name) makes a noise.`); | |
| } | |
| } | |
| class Dog extends Animal { | |
| speak() { | |
| console. log(`${this.name) barks.`); | |
| } | |
| } | |
| const dog = new Dog ("Rex"); | |
| dog.speak(); // Rex barks. |
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