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JavaScript Set集合 intersection() 方法
tryjsref_set_intersection
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<!DOCTYPE html> <html> <body> <h1>JavaScript Sets</h1> <h2>The intersection() Method</h2> <p>The intersection() method returns a new set containing the elements which are in this set and in the argument set:</p> <p id="demo"></p> <script> const A = new Set(['a','b','c']); const B = new Set(['b','c','d']); const C = A.intersection(B); let text = ""; for (const x of C) { text += x; } document.getElementById("demo").innerHTML = "The intersection is: " + text; </script> </body> </html>