- JavaScript Basics
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- JavaScript Date and Time
- JavaScript: date and time
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- JavaScript: toLocaleDateString()
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- JavaScript Regular Expression
- JavaScript: regular expression
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- JavaScript: RegEx quantifiers
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- JavaScript: RegEx source
- JavaScript Programs
- JavaScript Programs
JavaScript join(): Convert an array into a string
The JavaScript join() method returns a string from a specified array. For example:
HTML with JavaScript Code
<!DOCTYPE html> <html> <body> <p>The value of 'myString': <span id="xyz"></span></p> <script> const myArray = ["codes", "cracker", ".", "com"]; let myString = myArray.join(""); document.getElementById("xyz").innerHTML = myString; </script> </body> </html>
Output
The value of 'myString':
JavaScript join() syntax
The syntax of the join() method in JavaScript is:
array.join(separator)
The separator parameter is used to separate each item of the array when creating the string. The default value is a comma (,). For example:
HTML with JavaScript Code
<!DOCTYPE html> <html> <body> <p id="abc"></p> <script> const cities = ["Tokyo", "Los Angeles", "Bangkok", "Dubai"]; let str = cities.join(); document.getElementById("abc").innerHTML = str; </script> </body> </html>
Output
You can use any desired separator to separate each and every item of the array while joining them and creating a string. For example:
HTML with JavaScript Code
<!DOCTYPE html> <html> <body> <p id="mypara"></p> <script> const c = ["Tokyo", "Los Angeles", "Bangkok", "Dubai"]; let s = c.join(" | "); document.getElementById("mypara").innerHTML = s; </script> </body> </html>
Output
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