Question

How can I read the line break from a value with JavaScript and replace all the line breaks with <br /> elements?

Example:

A variable passed from PHP as below:

  "This is man.

     Man like dog.
     Man like to drink.

     Man is the king."

I would like my result to look something like this after the JavaScript converts it:

  "This is man<br /><br />Man like dog.<br />Man like to drink.<br /><br />Man is the king."

Answer 1

This will turn all returns into HTML

str = str.replace(/(?:\r\n|\r|\n)/g, '<br>');

In case you wonder what ?: means.
It is called a non-capturing group. It means that group of regex within the parentheses won’t be saved in memory to be referenced later.
You can check out these threads for more information:
https://stackoverflow.com/a/11530881/5042169
https://stackoverflow.com/a/36524555/5042169