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.
Negate predicate
JavaScript, Function
Negates a predicate function.
Random boolean value
JavaScript, Math
Generates a random boolean value.
Shallow clone object
JavaScript, Object
Creates a shallow clone of an object.
Time taken by function
JavaScript, Function
Measures the time it takes for a function to execute.
Unary function arity
JavaScript, Function
Creates a function that accepts up to one argument, ignoring any additional arguments.
Apply function when condition is met
JavaScript, Function
Returns a function that takes one argument and runs a callback if it's truthy or returns it if falsy.
Check if bottom of page is visible
JavaScript, Browser
Checks if the bottom of the page is visible.
Value is boolean
JavaScript, Type
Checks if the given argument is a native boolean element.
Value is number
JavaScript, Type
Checks if the given argument is a number.
Logarithm in specific base
JavaScript, Math
Calculates the logarithm of the given number in the given base.
Sum of numbers until n
JavaScript, Math
Sums all the numbers between
1andn.Create directory if not exists
JavaScript, Node
Creates a directory, if it does not exist.
Element is focused
JavaScript, Browser
Checks if the given element is focused.
Check if browser tab is focused
JavaScript, Browser
Checks if the browser tab of the page is focused.
Value is symbol
JavaScript, Type
Checks if the given argument is a symbol.