20 Commonly Used ES6 Techniques for Frontend Development
This article presents twenty practical ES6 tricks—including array shuffling, character filtering, string reversal, numeric base conversion, object merging, strict vs. loose equality, destructuring, variable swapping, palindrome checking, optional chaining, ternary operator, random selection, object freezing, duplicate removal, decimal precision, array clearing, color conversion, min‑max extraction, nullish coalescing, and false‑value filtering—each illustrated with concise code examples.
This guide lists twenty frequently used ES6 techniques that help JavaScript developers write cleaner and more efficient frontend code.
1. Shuffle an array – Randomly reorder array elements.
2. Remove all non‑numeric characters – Strip a string of everything except digits.
3. Reverse a string or words – Obtain the opposite order of characters or word sequence.
4. Convert decimal to binary or hexadecimal – Use built‑in methods to change number bases.
5. Merge multiple objects – Combine several objects into one.
6. Difference between === and == – Strict equality checks type and value, while loose equality performs type coercion.
7. Destructuring assignment – Extract values from arrays or objects into distinct variables.
8. Swap variable values – Exchange contents without a temporary variable.
9‑1. Palindrome detection – Determine if a string reads the same forward and backward.
9‑2. Check if two strings are permutations of each other – Verify whether one string is a rearranged version of another.
10. Optional chaining operator ( ?. ) – Safely access deep properties without explicit null checks. For example:
if (res && res.data && res.data.success) { // code }is equivalent to: if (res?.data?.success) { // code } 11. Ternary operator – Conditionally choose between two expressions.
12. Randomly select a value from an array – Pick an element at a random index.
13. Freeze an object – Make an object immutable using Object.freeze.
14. Remove duplicate elements from an array – Produce a unique set of values.
15. Keep a fixed number of decimal places – Format numbers with toFixed or similar methods.
16. Clear an array – Empty an array efficiently.
17. Convert RGB to HEX – Transform color representations.
18. Get maximum and minimum values from an array – Use Math.max / Math.min with spread syntax.
19. Nullish coalescing operator ( ?? ) – Return the right‑hand operand when the left is null or undefined.
20. Filter out false values from an array – Remove falsy elements such as false, 0, '', null, undefined, and NaN.
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