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An example of how to convert array elements into strings in JavaScript_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:35:061150browse

First, let’s look at the slice() method of selecting elements from an array:
Source code:

<!DOCTYPE html>
<html>
<body>
&#8203;
<p id="demo">Click the button to extract the second and the third elements from the array.</p>
&#8203;
<button onclick="myFunction()">Try it</button>
&#8203;
<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>
&#8203;
</body>
</html>

Test results:

Orange,Lemon

We can use the elements of the array to form a string. Related join() method usage examples:

Source code:

<!DOCTYPE html>
<html>
<body>
&#8203;
<p id="demo">Click the button to join the array elements into a string.</p>
&#8203;
<button onclick="myFunction()">Try it</button>
&#8203;
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var x=document.getElementById("demo");
x.innerHTML=fruits.join();
}
</script>
&#8203;
</body>
</html>

Test results: 

Banana,Orange,Apple,Mango

To directly convert an array to a string, you can use the toString() method:
Source code:

<!DOCTYPE html>
<html>
<body>
&#8203;
<p id="demo">点击按钮将数组转为字符串并返回。</p>
&#8203;
<button onclick="myFunction()">点我</button>
&#8203;
<script>
function myFunction()
{
 var fruits = ["Banana", "Orange", "Apple", "Mango"];
 var str = fruits.toString();
 var x=document.getElementById("demo");
 x.innerHTML= str;
}
</script>
&#8203;
</body>
</html>

Test results:

Banana,Orange,Apple,Mango

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