How does JavaScript's prototypal inheritance differ from classical inheritance?
Understanding the difference between these two object-oriented programming paradigms is key to taking your skills to the next level.
JavaScript Snippets
The JavaScript snippet collection contains a wide variety of ES6 helper functions. It includes helpers for dealing with primitives, arrays and objects, as well as algorithms, DOM manipulation functions and Node.js utilities.
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JavaScript · Clamp or map a number to a range in JavaScript
Clamping and mapping a number to a range are two common and easily confused operations. Learn how to perform each in JavaScript.
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JavaScript · Understanding JavaScript variables and scopes
JavaScript developers often get confused by JavaScript's variables and scope. Here's a quick guide to understanding these concepts.
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JavaScript · How to swap two variables in JavaScript
Learn how to swap the values of two variables in JavaScript using a single line of ES6 code.
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JavaScript · Generate a random number or integer in a range with JavaScript
Enhance JavaScript's
Math.random()to generate a random number or integer in a specified range. -
JavaScript · Prevent a string from being escaped in JavaScript
Strings in JavaScript can be escaped in various ways. But how do you prevent a string from being escaped? Here's a handy trick for that.
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JavaScript · Get the scroll position of the current page using JavaScript
Calculate the coordinates of the current scroll position in the browser window using JavaScript.
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JavaScript · How can I calculate the distance between two coordinates using JavaScript?
Given two pairs of latitude and longitude coordinates, you can calculate the distance between them using the Haversine formula. Let's find out how.
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JavaScript · How can I detect an undefined object property in JavaScript?
Learn how to detect
undefinedobject properties in JavaScript the correct way. -
JavaScript · Convert decimal number to hexadecimal
Ever needed to convert a decimal number to hexadecimal? Here's a quick and easy way to do it.
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JavaScript · Is JavaScript pass-by-value or pass-by-reference?
How JavaScript handles passing data is a source of confusion and bugs for many developers, especially when it comes to object types.
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JavaScript · How can I partially apply a function in JavaScript?
Learn how to leverage partial application to improve the reusability of your JavaScript functions.
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JavaScript · Validate a number in JavaScript
Check if a value can be safely converted to a number in JavaScript.
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JavaScript · Insert HTML string before or after element using JavaScript
Learn how to insert an HTML string before or after the start of a specified element using JavaScript.
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JavaScript · Hamming distance implementation in JavaScript
Learn how to calculate the Hamming distance between two values.
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JavaScript · Check if the bottom of the page is visible using JavaScript
If you've ever needed to check if the bottom of the page is visible, this snippet will help you do just that.
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JavaScript · How can I calculate the binomial coefficient in JavaScript?
Calculate the number of ways to choose k items from n items without repetition and without order.
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JavaScript · Check if a JavaScript array includes any or all values in another array
Check if any or all the elements in an array are included in another array.
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JavaScript · Pluralize a JavaScript string
Learn how to pluralize a string in JavaScript based on a number.
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JavaScript · JavaScript Logical Operations
Get started with logical operations in JavaScript with this collection of helper functions.
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JavaScript · Convert between a JavaScript Date object and a Unix timestamp
Easily convert between a JavaScript Date object and a Unix timestamp.
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JavaScript · Attempt invoking a JavaScript function
Wrap a function call in a
try...catchblock to handle errors and return the result or the caught error object. -
JavaScript · What's the difference between undeclared, undefined and null in JavaScript?
JavaScript has three different empty states for variables. Learn their differences and how you can check for each one.
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JavaScript · Check if localStorage or sessionStorage is enabled
Check if
localStorageorsessionStorageis enabled in the browser, using a simple JavaScript function.