Is there a standard function to check for null, undefined, or blank variables in JavaScript?

by

Is there a standard function to check for null, undefined, or blank variables in JavaScript?

More Related Contents:

  1. What is the difference between null and undefined in JavaScript?
  2. How can I determine if a variable is ‘undefined’ or ‘null’?
  3. Why is null an object and what’s the difference between null and undefined?
  4. How to check for an undefined or null variable in JavaScript?
  5. JavaScript checking for null vs. undefined and difference between == and ===
  6. How do I check for null values in JavaScript?
  7. Why `null >= 0 && null
  8. Why is there a `null` value in JavaScript?
  9. How to resolve TypeError: Cannot convert undefined or null to object
  10. What reason is there to use null instead of undefined in JavaScript?
  11. JavaScript String concatenation behavior with null or undefined values
  12. When is null or undefined used in JavaScript? [duplicate]
  13. Is it better to return `undefined` or `null` from a javascript function? [closed]
  14. Should JSON include null values [closed]
  15. Sort array of objects by string property value
  16. How can I check for an empty/undefined/null string in JavaScript?
  17. How can I check for “undefined” in JavaScript? [duplicate]
  18. Object comparison in JavaScript [duplicate]
  19. What’s the prettiest way to compare one value against multiple values? [duplicate]
  20. JavaScript check if variable exists (is defined/initialized)
  21. getElementById() returns null even though the element exists [duplicate]
  22. JavaScript check if variable exists (is defined/initialized)
  23. Optimum way to compare strings in JavaScript? [duplicate]
  24. How to check identical array in most efficient way? [duplicate]
  25. JavaScript `undefined` vs `void 0`
  26. next.js environment variables are undefined (Next.js 10.0.5)
  27. Anagrams finder in javascript
  28. Set a variable if undefined in JavaScript
  29. How to check null objects in jQuery
  30. JSLint: was used before it was defined

Leave a Comment