Undefined Is Not Null: There Is a Difference – JavaScript Developer Humor Magnet
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- Die-cut magnets add a touch of easily switchable flair to your fridge, locker, or file cabinet
- Available in three sizes
- Flexible, durable 20mil / 0.5mm vinyl
- Vibrant color printing
- Approximately 4mm white border around design
- WARNING: Choking Hazard small parts. Not for children under 3.
- This product contains magnets. Swallowed magnets can stick together across intestines causing serious injuries. Seek immediate medical attention if magnets are swallowed.
- Not a toy. For decorative use only.
- Since every item is made just for you by your local third-party fulfiller, there may be slight variances in the product received
Undefined Is Not Null: There Is a Difference – JavaScript Developer Humor
undefined !== null // there is a difference. Every JavaScript developer has been bitten by this one: two values that look like “nothing” but aren’t the same thing, and a strict equality operator that knows it. This design shows the comparison as a block of code in terminal green and red, with the punchline written as a code comment.
Made for web developers, frontend engineers and anyone who has ever debugged a “cannot read properties of undefined” error at 2 a.m. A good fit for code review survivors, team chats and coworker gift swaps.
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