1. Utilize Tagged Template Literals for Cleaner HTML/SVG Generation

  • Use Case: Dynamically generate HTML or SVG content.
  • Benefits: Improves readability and maintainability.
  • Example:
    1
2
3
4
5
6
7

    const item = 'cup';
const quantity = 3;
const htmlContent = html`<div>You ordered ${quantity} ${item}s.</div>`;

function html(strings, ...values) {
  return strings.reduce((acc, str, i) => `${acc}${str}${values[i] || ''}`, '');
}

2. Adopt Object.observe for Reactive Programming

  • Use Case: Implement data-binding for web components without external libraries.
  • Benefits: Reduces library dependencies and enhances performance.
  • Example:
    1
2
3
4
5

    let data = { price: 5 };
Object.observe(data, changes => {
  console.log('Changes:', changes);
});
data.price = 20;  // Console logs the change details.

3. Employ Proxy for Fine-Grained Property Access Control

  • Use Case: Logging, data validation, or access control.
  • Benefits: Provides a powerful abstraction layer for manipulating object behavior.
  • Example:
     1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12

    const validator = {
  set: function(obj, prop, value) {
    if (prop === 'age' && !Number.isInteger(value)) {
      throw new TypeError('Age must be an integer.');
    }
    obj[prop] = value;
    return true;
  }
};
const person = new Proxy({}, validator);
person.age = 30;  // Works fine
person.age = 'old';  // Throws an error

4. Use Async Generators for Streamlined Asynchronous Flow

  • Use Case: Handling streams of data, such as reading large files.
  • Benefits: Simplifies code for asynchronous data handling.
  • Example:
    1
2
3
4
5
6
7
8
9

    async function* asyncDataFetcher() {
  yield fetch('/api/data1');
  yield fetch('/api/data2');
}
(async () => {
  for await (let data of asyncDataFetcher()) {
    console.log(await data.json());
  }
})();

5. Implement BigInt for High-Precision Calculations

  • Use Case: Handling large integers beyond the safe limit for Number.
  • Benefits: Ensures accuracy and reliability in financial and scientific calculations.
  • Example:
    1
2

    const largeNumber = BigInt(9007199254740991) + BigInt(1);
console.log(largeNumber.toString());  // "9007199254740992"

6. Opt for Pipeline Operator for Readable Function Composition

  • Use Case: Transforming data through multiple functions.
  • Benefits: Enhances code clarity and composition style.
  • Example:
    1
2
3
4

    const double = n => n * 2;
const increment = n => n + 1;
let result = 3 |> double |> increment;  // Equivalent to increment(double(3))
console.log(result);  // 7

7. Use Nullish Coalescing for Default Assignments

  • Use Case: Setting defaults when dealing with possibly null or undefined values.
  • Benefits: Prevents common bugs associated with falsy values.
  • Example:
    1
2
3

    let undefinedValue;
let result = undefinedValue ?? 'default';
console.log(result);  // "default"

8. Leverage Logical Assignment Operators for Succinct Conditions

  • Use Case: Simplifying conditional assignments.
  • Benefits: Reduces boilerplate code significantly.
  • Example:
    1
2
3
4

    let a = 1;
let b = 2;
a &&= b;
console.log(a);  // Outputs 2 since a is true-ish and gets assigned b

9. Employ Optional Chaining to Safeguard Accessing Properties

  • Use Case: Accessing deeply nested object properties.
  • Benefits: Avoids verbose and error-prone checks.
  • Example:
    1
2
3
4
5
6
7
8

    const adventurer = {
  name: 'Alice',
  cat: {
    name: 'Dinah'
  }
};
const catName = adventurer.cat?.name;
console.log(catName);  // "Dinah"

10. Adopt Modules for Better Project Structure

  • Use Case: Organizing code in a maintainable and scalable way.
  • Benefits: Facilitates easier maintenance and scaling of applications.
  • Example:
    1
2
3
4
5
6
7
8

    // file: math.js


export const add = (x, y) => x + y;

// file: app.js
import { add } from './math.js';
console.log(add(2, 3));  // 5

11. Use Web Workers for Offloading Intensive Tasks

  • Use Case: Improving application responsiveness by offloading tasks.
  • Benefits: Keeps the main thread unblocked, improving UI responsiveness.
  • Example:
    1
2
3
4
5

    const worker = new Worker('worker.js');
worker.postMessage('Hello');
worker.onmessage = function(event) {
  console.log('Received:', event.data);
};

12. Implement Memoization to Optimize Performance

  • Use Case: Optimizing repetitive function calls with the same arguments.
  • Benefits: Saves computation time after the initial call.
  • Example:
     1
 2
 3
 4
 5
 6
 7
 8
 9
10

    const memoize = (fn) => {
  const cache = {};
  return function(...args) {
    const key = JSON.stringify(args);
    if (!cache[key]) {
      cache[key] = fn.apply(this, args);
    }
    return cache[key];
  };
};

13. Opt for Structured Cloning for Deep Copying Objects

  • Use Case: Creating a deep copy of objects without external libraries.
  • Benefits: Native and reliable method avoiding the pitfalls of manual cloning.
  • Example:
    1
2
3

    const original = { a: 1, b: { c: 2 } };
const copy = structuredClone(original);
console.log(copy);  // { a: 1, b: { c: 2 } }

14. Leverage CSS-in-JS for Scoped Styles

  • Use Case: Styling components in React or similar libraries.
  • Benefits: Enhances component encapsulation and modularity.
  • Example:
     1
 2
 3
 4
 5
 6
 7
 8
 9
10

    const Button = styled.button`
  background: blue;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 5px;
  &:hover {
    background: darkblue;
  }
`;

15. Use Environment Variables for Application Configuration

  • Use Case: Managing different configurations for development, testing, and production.
  • Benefits: Improves security and flexibility of application deployments.
  • Example:
    1

    console.log(process.env.NODE_ENV);  // Outputs 'development', 'production', etc.