JavaScript Set methods reach Baseline
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— Published: June 26, 2024
The JavaScript Set methods for common set operations are now available across browsers and have joined Baseline. Developers can use built-in methods such as intersection(), union(), and others instead of writing custom logic.
The new methods simplify working with the essential data structure. intersection() returns a new set with elements present in both sets, while union() returns a new set with all elements from both sets. difference() yields a set with elements from the original that are not in the supplied set, and symmetricDifference() gives elements that belong to one set or the other, but not both.
For comparison checks, isSubsetOf() evaluates whether every element in the original set exists in the given set, isSupersetOf() does the reverse check, and isDisjointFrom() indicates if the two sets have no common elements.
Moving code to these built-in methods improves performance and cuts technical debt, according to the announcement.
