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JavaScript Set集合 difference() 方法
tryjsref_set_difference
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<!DOCTYPE html> <html> <body> <h1>JavaScript Sets</h1> <h2>The difference() Method</h2> <p>The difference() method returns a new set containing elements which are in this set but not 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.difference(B); let text = ""; for (const x of C) { text += x; } document.getElementById("demo").innerHTML = "The difference is: " + text; </script> </body> </html>