An Introduction to JavaScript Proxy
A quick introduction to the JavaScript Proxy object and where it can be used.
JavaScript Object 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 · -
JavaScript · Nest linked JavaScript objects
Learn how to recursively nest objects linked to one another in a flat array.
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JavaScript · Map a JavaScript object to an array
Map an object to an object array, using the provided mapping function.
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JavaScript · What is the difference between JavaScript's for...in, for...of and forEach?
Learn the differences between the three most commonly used iteration methods in JavaScript, that often confuse beginners and veterans alike.
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JavaScript · Compact an array or object in JavaScript
Learn how to compact an array or object in JavaScript using the
Booleanfunction and recursion. -
JavaScript · Combine 2 JavaScript object arrays based on a key
Learn how to merge two arrays of objects, while combining objects based on a specified key.
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JavaScript · Uppercase or lowercase object keys in JavaScript
Convert all the keys of an object to upper or lower case.
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JavaScript · Find matching keys in a JavaScript object
Find all the keys in a JavaScript object that match the given value.
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JavaScript · Invert the key-value pairs of a JavaScript object
Learn how to invert the key-value pairs of an object in JavaScript.
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JavaScript · Filter a JavaScript object's properties by keys or values
Learn how to transform objects by filtering their properties based on an array of keys or a predicate function.
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JavaScript · Can I create dynamic setters and getters in JavaScript?
Using the Proxy object, we can create dynamic getters and setters for objects in JavaScript.
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JavaScript · Assign default values for a JavaScript object's properties
Assign default values for all properties in an object that are
undefined. -
JavaScript · Serialize specific properties from a JSON object
Have you ever wanted to serialize an object but only include certain keys? Turns out JavaScript provides an easy way to do this!
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JavaScript · Group array elements based on a function
Group the elements of an array based on the given function, producing an object with the grouped values.
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JavaScript · Iterate over a JavaScript object's own properties
Iterate over all own properties of an object, running a callback for each one.
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JavaScript · Chaining dynamic getters using the Proxy object
Using the Proxy object, we can create chainable dynamic getters for objects in JavaScript.
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JavaScript · What does 'use strict' do and what are some of the key benefits to using it?
JavaScript's strict mode can make your code faster, cleaner and more secure.
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JavaScript · Unwind a JavaScript object
Create an array of objects from an object and one of its array-valued properties.
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JavaScript · Typechecking objects with Proxy in JavaScript
Learn how to type check objects at runtime using the powerful Proxy object in JavaScript.
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JavaScript · Walk through a JavaScript object depth-first
Create a generator that walks through all the keys of a given object.
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JavaScript · Validate the properties of a JavaScript object
Check the properties of an object against an array of keys or another object to ensure they match.
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JavaScript · Map a JavaScript array to an object
Map the values of an array to an object, using the given mapping functions.
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JavaScript · Check if a JavaScript collection is empty
Quickly determine if a collection of values is empty in JavaScript.
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JavaScript · You can't extend JavaScript's Proxy object
Turns out the Proxy object is not extensible, but there's a way around its limitations.