如何缩小 JavaScript 中的数组?
以下是在 JavaScript 中缩小数组的代码 −
示例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; font-weight: 500; color: red; } .result { color: blueviolet; } button { padding: 8px; } </style> </head> <body> <h1>Reduce arrays javascript</h1> <div><pre class="sample">[1,3,5,6,9,22,15]</pre></div> <div class="result"></div> <button class="Btn">Sum</button> <h3>Click on the above button to sum the elements of the array</h3> <script> let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let sampleEle = document.querySelector(".sample"); let arr = [1, 3, 5, 6, 9, 22, 15]; sampleEle.innerHTML = arr; BtnEle.addEventListener("click", () => { resEle.innerHTML = "Sum = " + arr.reduce((sum, prev) => { return sum + prev; }); }); </script> </body> </html>
输出
点击“求和”按钮 −
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