PHP's Dot Equals `.=` operator in Javascript?

Question

How can you use PHP's Dot Equals .= operator in Javascript?

Answer 1

I assume that the .= operator is used for string concatenation?

In Javascript the + operator is used for string concatenation, and the += operator for reassigning the string to the same variable. Example:

s += ',';

Answer 2

use += eg:

a = 'Hello'
a += 'World'

Answer 3

What you are mentioning is a contatenation equals operator which sets the value of the left hand operand to a string containing a concatenation of its value appended with the string in the right hand operand.

You can do the same operation in javascript using the += operator.

var str = "test";

str += " appended string";

Answer 4

 var a = "";
 a += "fff";