举例讲解JavaScript中将数组元素转换为字符串的方法

前端技术 2023/08/08 JavaScript

首先来看一下从一个数组中选择元素的方法slice():
源代码:

<!DOCTYPE html>
<html>
<body>
​
<p id=\"demo\">Click the button to extract the second and the third elements from the array.</p>
​
<button onclick=\"myFunction()\">Try it</button>
​
<script>
function myFunction()
{
var fruits = [\"Banana\", \"Orange\", \"Lemon\", \"Apple\", \"Mango\"];
var citrus = fruits.slice(1,3);
var x=document.getElementById(\"demo\");
x.innerHTML=citrus;
}
</script>
​
</body>
</html>   

测试结果:

Orange,Lemon

我们可以用数组的元素组成字符串,相关的join()方法使用例子:

源代码:

<!DOCTYPE html>
<html>
<body>
​
<p id=\"demo\">Click the button to join the array elements into a string.</p>
​
<button onclick=\"myFunction()\">Try it</button>
​
<script>
function myFunction()
{
var fruits = [\"Banana\", \"Orange\", \"Apple\", \"Mango\"];
var x=document.getElementById(\"demo\");
x.innerHTML=fruits.join();
}
</script>
​
</body>
</html> 

测试结果:

Banana,Orange,Apple,Mango

直接转换数组到字符串则可以用toString()方法:
源代码:

<!DOCTYPE html>
<html>
<body>
​
<p id=\"demo\">点击按钮将数组转为字符串并返回。</p>
​
<button onclick=\"myFunction()\">点我</button>
​
<script>
function myFunction()
{
 var fruits = [\"Banana\", \"Orange\", \"Apple\", \"Mango\"];
 var str = fruits.toString();
 var x=document.getElementById(\"demo\");
 x.innerHTML= str;
}
</script>
​
</body>
</html>

测试结果:

Banana,Orange,Apple,Mango 

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