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JavaScript 类型化数组 copyWithin() 方法
tryjsref_typed_copywithin_2
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<!DOCTYPE html> <html> <body> <h1>JavaScript Typed Arrays</h1> <h2>The copyWithin() Method</h2> <p>The copyWithin() method copies array elements to another position in an array.</p> <p id="demo"></p> <script> // Create an Array const myArr = Int32Array.of(10,20,30,40,50,60); myArr.copyWithin(2, 0, 2); document.getElementById("demo").innerHTML = "The value of the element with index 3 is: " + myArr.at(3) </script> </body> </html>