The invocation context (this) of the forEach function call

by

MDN states:

array.forEach(callback[, thisArg])

If a thisArg parameter is provided to forEach, it will be used as the
this value for each callback invocation as if callback.call(thisArg,
element, index, array) was called. If thisArg is undefined or null,
the this value within the function depends on whether the function is
in strict mode or not (passed value if in strict mode, global object
if in non-strict mode).

So in short, if you only provide the callback and you’re in non-strict mode (the case you presented), it will be the global object (window).

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

More Related Contents:

  1. How do I use ‘this” keyword in an object literal? [closed]
  2. Javascript call() & apply() vs bind()?
  3. Javascript “this” pointer within nested function
  4. this inside function
  5. Why doesn’t console.log work when passed as a parameter to forEach?
  6. What object javascript function is bound to (what is its “this”)?
  7. The reason to use JS .call() method?
  8. setTimeout not working inside forEach
  9. onClick Function “this” Returns Window Object
  10. var functionName = function() {} vs function functionName() {}
  11. JavaScript: Difference between .forEach() and .map()
  12. Javascript setInterval and `this` solution
  13. ES6 destructuring function parameter – naming root object
  14. JavaScript, Node.js: is Array.forEach asynchronous?
  15. How does Asynchronous Javascript Execution happen? and when not to use return statement?
  16. JavaScript function order: why does it matter?
  17. Higher-order functions in Javascript
  18. Javascript Array of Functions
  19. Why are certain function calls termed “illegal invocations” in JavaScript?
  20. Return value from nested function in Javascript [duplicate]
  21. $http.get(…).success is not a function
  22. How can I use optional chaining with arrays and functions?
  23. Javascript – Precedence in hoisting
  24. Group javascript array object by same key
  25. Why is “forEach not a function” for this object?
  26. Change onClick attribute with javascript
  27. Passing a local variable from one function to another
  28. Function not calling within an onclick event
  29. Javascript function need allow numbers, dot and comma
  30. How to bind methods when destructuring an object in JavaScript?

Leave a Comment