JavaScript join() method


JavaScript join() Method

Instance

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">

</head>
<body>

<p id="demo">点击按钮将数组作为字符串输出。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
	var fruits = ["Banana", "Orange", "Apple", "Mango"];
	var x=document.getElementById("demo");
	x.innerHTML=fruits.join();
}
</script>

</body>
</html>

Run Instance»

Click the "Run Example" button to view the online example

Definition and usage

The join() method is used to convert all elements in the array into a string.

Elements are separated by the specified delimiter.

Browser support

QQ截图20161108165429.png

All major browsers support the join() attribute.

Syntax

##array.join(separator)
Parameter value

ParametersDescriptionOptional. Specify the delimiter to use. If this parameter is omitted, a comma is used as the delimiter.
separator
Return value

TypeDescriptionStringReturns a string. The string is generated by converting each element of the arrayObject to a string and then concatenating the strings, inserting the separator string between the two elements.
Technical Details

JavaScript Version: 1.1

More examples

Instances

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">

</head>
<body>

<p id="demo">点击按钮将数组作为字符串输出。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
	var fruits = ["Banana", "Orange", "Apple", "Mango"];
	var x=document.getElementById("demo");
	x.innerHTML=fruits.join(" and ");
}
</script>

</body>
</html>

Running examples»Click the "Run Instance" button to view the online instance


←