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<h1>JavaScript 数组</h1>
<p>Array.toString() 方法返回字符串，其中所有数组值以逗号分隔：</p>
<p id="demo"></p>
<script>
const fruits = ["Banana", "Orange", "Apple", "Mango"];
let text = fruits.toString();
document.getElementById("demo").innerHTML = text;
</script>
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