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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Truthy - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/Truthy | reference | web, html, css, javascript, documentation | 2026-05-05T05:47:31.902189+00:00 | kb-cron |
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Truthy
In JavaScript, a truthy value is a value that is considered true when encountered in a Boolean context. All values are truthy unless they are defined as falsy. That is, all values are truthy except false, 0, -0, 0n, "", null, undefined, NaN, and document.all.
JavaScript uses type coercion in Boolean contexts.
Examples of truthy values in JavaScript (which will be coerced to true in boolean contexts, and thus execute the if block):
If the first operand is truthy, the logical AND operator returns the second operand:
In this article
See also
- Related glossary terms:
- Boolean coercion