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What is the usage of join in javascript

WBOYOriginal: 2021-12-29 16:39:3213417browse

In JavaScript, the join() method is used to convert all elements in the array into a string and set the separator between elements. The default separator is comma and the syntax is "array.join(split symbol)".

The operating environment of this tutorial: Windows 10 system, JavaScript version 1.8.5, Dell G3 computer.

What is the usage of join in javascript

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

Elements are separated by the specified delimiter.

The syntax is as follows:

array.join(separator)

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

Return 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.

The example is as follows:

<html>
<head>
<meta charset="utf-8">
<title>123</title>
</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>

Output result:

What is the usage of join in javascript

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