JS Tips

Useful JavaScript tips

This is an awesome project about short and useful JavaScript tips that will help you improve your code writing. In less than 2 minutes, you can read about performance, conventions, hacks, interview questions and all the items that the future of this awesome language holds for us.

Tips are added frequently (read further if you want to stay in touch).

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Tips list

74 - Check the reason make your page re-render by changed props and state
73 - Hash maps without side effects
72 - Adventurers Guide to React (Part I)
71 - VueJS, How VueJS makes a copy-update-replace inside the data binding
70 - Picking and rejecting object properties
69 - Enhancing React components, Composition
68 - Why you should use Object.is() in equality comparison
67 - Recursion, iteration and tail calls in JS
66 - State to Props maps with memory
65 - Tapping for quick debugging
64 - 3 Array Hacks
63 - Working With Websocket Timeout
62 - Preventing Unwanted Scopes Creation in AngularJs
61 - Binding objects to functions
60 - Three useful hacks
59 - ES6, var vs let
58 - Breaking or continuing loop in functional programming
57 - Comma operator in JS
56 - Copy to Clipboard
55 - Create an easy loop using an array
54 - How to use optional arguments in functions (with optional callback)
53 - Get File Extension
52 - Return Values with the 'new' Operator
51 - DOM event listening made easy
50 - Helpful Console Logging Tricks
49 - Easiest way to extract Unix timestamps
48 - Reduce builtin function usage
47 - Basics: Declarations
46 - Detect document ready in pure JS
45 - Calculate the Max/Min value from an array
44 - Know the passing mechanism
43 - Use destructuring in function parameters
42 - Preventing Unapply Attacks
41 - Array average and median
40 - Using JSON.stringify
39 - Advanced Properties
38 - Flattening multidimensional Arrays
37 - Deduplicate an Array
36 - Observe DOM changes in extensions
35 - Assignment Operators
34 - Implementing asynchronous loop
33 - Create Range 0...N easily using one line
32 - Map() to the rescue: adding order to Object properties
31 - Avoid modifying or passing arguments into other functions — it kills optimization
30 - Converting truthy/falsy values to boolean
29 - Speed up recursive functions with memoization
28 - Currying vs partial application
27 - Short circuit evaluation
26 - Filtering and sorting a list of Strings
25 - Using immediately invoked function expression
24 - Use === instead of ==
23 - Converting to number fast way
22 - Empty an Array
21 - Shuffle an Array
20 - Return objects to enable chaining of functions
19 - Safe String concatenation
18 - Truncating the fast (but risky) way
17 - Node.js: Run a module if it is not "required"
16 - Passing arguments to callback functions
15 - Even simpler way of using indexOf as a contains clause
14 - Fat Arrow Functions #ES6
13 - Measure performance of a code block
12 - Pseudomandatory parameters in ES6 functions #ES6
11 - Hoisting
10 - Check if a property is in an Object
09 - Template Strings
08 - Converting a Node List to an Array
07 - "use strict" and get lazy
06 - Writing a single method for arrays and a single element
05 - Differences between undefined and null
04 - Sorting Strings with accented characters
03 - Improve Nested Conditionals
02 - ReactJS - Keys in children components are important
01 - AngularJS: $digest vs $apply
00 - [Insert ite

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JS Tips

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Tips list