What is the usage of join in javascript
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:
javascript learning tutorial 】
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