W3School TIY Editor
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<!DOCTYPE html> <html> <body> <p>“扩展”运算符将可迭代对象的元素展开：</p> <p id="demo"></p> <script> const numbersOne = [1, 2, 3]; const numbersTwo = [4, 5, 6]; const numbersCombined = [...numbersOne, ...numbersTwo]; document.getElementById("demo").innerHTML = numbersCombined; </script> </body> </html>