Joining Strings Together in Javascript

Last Updated on: October 10, 2022

It is common to want to join several smaller strings into a large string. The obvious way to do this is with a string concatenation operation, but in JavaScript, this can have a negative effect on performance.

This is because the string concatenation operations can produce too many intermediate strings, making it perform poorly.

As the number of concatenation operations increases, it can be better to use another concatenation method like the Array.join() function, which joins the strings together into an array.

An alternative method is to use the string.concat() method to join the strings together. This example demonstrates the use of this method:

Modern browsers support all three of these methods, but the browser performance can differ between browsers and even versions of the same browser. To optimize your code, write a sample of code that uses each method a lot of times (one million, for example), time the results with different browsers, and see which is consistently the fastest.

Use the fastest for your string operations for optimum results.

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