Suggest an editImprove this articleRefine the answer for “== vs ===”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**`==`** performs a loose comparison, converting operand types before comparing them, while **`===`** performs a strict comparison with no type conversion: operands must be of the same type and value. **Key point:** Always use `===` (and `!==`) unless there is a specific reason for a loose comparison - it makes code predictable and reduces the number of bugs.Shown above the full answer for quick recall.Answer (EN)Image### `==` - loose (abstract) comparison `==` **converts operand types** before comparing them. In other words, JavaScript tries to "guess" whether the values are equal **after type coercion**. **Examples:** ```javascript 5 == '5' // true → the string '5' is converted to the number 5 0 == false // true → false is coerced to 0 null == undefined // true → this is the only case where they are equal ' ' == 0 // true → an empty string is converted to 0 ``` > Danger: implicit conversions often cause bugs, especially when validating user input or data from an API. --- ### `===` - strict comparison `===` **does not perform type conversion**. Operands must be of **the same type and value** for the result to be `true`. **Examples:** ```javascript 5 === '5' // false → different types (number and string) 0 === false // false → different types null === undefined // false → different types 5 === 5 // true → same value and type ``` ### Summary: when to use what **Recommendation:** Always use `===` (and `!==`) unless you have a specific reason to use a loose comparison. This makes code predictable and reduces the number of bugs.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.