Undefined Is Not Null: There Is a Difference – JavaScript Developer Humor Relaxed T-Shirt
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$18.14
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Style
Relaxed T-ShirtRelaxed tee, crewneck, draped fit
$18.14
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- Soft tee in a relaxed fit
- Vintage wash fabric that drapes with you
- Ribbed collar and ribbed sleeves for comfort
- Midweight 55% ringspun cotton/45% polyester vintage wash jersey
- Washing instructions: Hand or machine wash cold. Do not dry clean, bleach, tumble dry or iron on the print
- The third party printer of this product is evaluated according to International Labor Organization standards
- The printer of this product sources blanks from manufacturers that are participating members of the Fair Labor Association
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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