实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>手册网教程(shouce.ren)</title>
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</head>
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<body>
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​
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<p>点击按钮计算数组元素的总和。</p>
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<button onclick="myFunction()">点我</button>
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​
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<p>数组元素总和: <span id="demo"></span></p>
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​
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<script>
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var numbers = [65, 44, 12, 4];
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​
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function getSum(total, num) {
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    return total + num;
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}
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function myFunction(item) {
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    document.getElementById("demo").innerHTML = numbers.reduceRight(getSum);
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}
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</script>
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​
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</body>
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</html>