Glossary Term
Map.prototype.has()
2 tags
1 category
The has() method of Map instances returns a boolean indicating whether an entry with the specified key exists in this Map or not.
Return value: Returns true if an entry with the specified key exists in the Map object; otherwise false.
Parameters: key The key of the entry to test for presence in the Map object. Object keys are compared by reference, not by value.
Syntax example: has(key)
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