10 JavaScript Snippets That Save Hours

 

Top 10 JavaScript Snippets That Save You Hours

Let’s face it — as developers, we often write the same utility code over and over. What if you could save hours (even days) just by having the right JavaScript snippets at your fingertips?

Whether you're debugging, manipulating data, or handling DOM elements, these 10 supercharged JS snippets will speed up your workflow and help you write cleaner, smarter code — faster.

🎯 1. Copy to Clipboard

📋 Quickly copy text to clipboard — ideal for share buttons or copy links.

js


const copyToClipboard = (text) => navigator.clipboard.writeText(text);
copyToClipboard("Copied!");

🖼️ Visual Suggestion:
➡️ Minimal clipboard icon
➡️ "Copied!" popup-style animation (floating text)

---

🧪 2. Check if an Object is Empty

🔍 Handy for validating API responses or empty forms.

js


const isEmpty = (obj) => Object.keys(obj).length === 0;

🖼️ Visual Suggestion:
➡️ Object icon with keys flying out
➡️ Empty vs filled object diagram

---

⏳ 3. Debounce Function

🚀 Prevents a function from being called too often — great for search inputs!

js


const debounce = (fn, delay) => {
  let timer;
  return (...args) => {
    clearTimeout(timer);
    timer = setTimeout(() => fn.apply(this, args), delay);
  };
};

🖼️ Visual Suggestion:
➡️ Typing animation with delay effect
➡️ Search input with loader bar

---

🔠 4. Capitalize First Letter

✨ Format names, titles, or user input with ease.

js


const capitalize = str => str.charAt(0).toUpperCase() + str.slice(1);

🖼️ Visual Suggestion:
➡️ "john" → "John" transformation
➡️ ABC-style typography animation

---

🆔 5. Generate Random ID

🧬 Useful for keys in React or generating short IDs.

js

const randomID = () => '_' + Math.random().toString(36).substr(2, 9);

🖼️ Visual Suggestion:
➡️ Spinning ID badge
➡️ Console.log printing a unique ID

---

🌗 6. Detect Dark Mode

🌓 Respect your user’s theme preference — light or dark!

js


const isDarkMode = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;

🖼️ Visual Suggestion:
➡️ Sun & Moon toggle icon
➡️ Browser window switching theme

---

📋 7. Deep Clone an Object

🧩 Great for working with React state or nested JSON.

js

const deepClone = (obj) => JSON.parse(JSON.stringify(obj));

🖼️ Visual Suggestion:
➡️ Copy-paste of nested object
➡️ Visual of data cloning with arrows

---

🧹 8. Flatten an Array

📚 Collapse arrays within arrays — super handy for APIs.

js


const flatten = arr => arr.reduce((a, b) => a.concat(b), []);

🖼️ Visual Suggestion:
➡️ 2D layered array turning into one line
➡️ Before vs After transformation

---

🔍 9. Get Query Params as Object

🔗 Parse ?id=123&type=admin into a readable object.

js

const getQueryParams = () => 
  Object.fromEntries(new URLSearchParams(window.location.search));

🖼️ Visual Suggestion:
➡️ Browser URL bar and object breakdown
➡️ Console.log view of param object

---

🎲 10. Shuffle an Array

🃏 Randomize list order — great for quizzes or featured products!

js

const shuffle = (arr) => arr.sort(() => Math.random() - 0.5);

🖼️ Visual Suggestion:
➡️ Cards or items being shuffled
➡️ Dice icon with JS array

---

✅ Conclusion

These JavaScript snippets aren't just clever — they’re lifesavers for anyone building front-ends, React apps, or just trying to write smarter code. Keep this list bookmarked and use them as your go-to toolkit.

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