NeuroAgent

How to Check if Variable is String in JavaScript

Learn the best methods to check if a variable is a string in JavaScript. Compare typeof, instanceof, and Object.prototype.toString() approaches with practical examples and performance considerations.

  • #javascript-type-checking
  • #string-detection
  • #typeof-operator
  • #instanceof-operator
  • #object-prototype-tostring
  • #javascript-variables
  • #programming-basics
NeuroAgent

Complete Guide: Check if Variable is Array in JS

Learn the best methods to check if a variable is an array in JavaScript. Discover Array.isArray(), compare with instanceof, and build robust input handlers for strings and arrays.

  • #javascript-array-detection
  • #array-isarray-method
  • #javascript-type-checking
  • #instanceof-operator
  • #javascript-input-handling
  • #cross-browser-javascript
  • #array-conversion-methods