Join strings with built in control flow and handle separator

📦 Check if a given value is empty in JS extending his "truthy" and "falsy" nature

Test if a value is falsy.

Test if a value is truthy.

Test if a value is an array-like object containing only falsy values.

Count the number of falsy elements in an array.

Test if a value is an array-like object containing only truthy values.

Returns a copy of the arraywith all falsy values removed.

A simple utility to find out falsy values from an object or arrays.

JavaScript Equality Comparisons and Sameness Table 📜󠀽

Checking how undefined string and number variables handles truthiness