regex extract email from strings

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You can create a function with regex /([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/ to extract email ids from long text

function extractEmails (text) {
  return text.match(/([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi);
}

Script in action: Run to see result

var text = `boleh di kirim ke email saya [email protected] tks... boleh minta kirim ke [email protected]. [email protected]. . 
[email protected] Senior Quantity Surveyor
[email protected], terimakasih bu Cindy Hartanto
[email protected] saya mau dong bu cindy
[email protected] 
Hi Cindy ...pls share the Salary guide to [email protected] thank a`; 

function extractEmails ( text ){
    return text.match(/([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi);
    }
     
    $("#emails").text(extractEmails(text));
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<p id="emails"></p>

While the regex in the above code snippet matches most email patterns, but if you still need to match >99% of the email patterns, including the edge cases (like ‘+’ in the email) then use the regex pattern as shown below

Script in action: Run to see result 

var text = `boleh di kirim ke email saya [email protected] tks... boleh minta kirim ke [email protected]. [email protected]. . 
[email protected] Senior Quantity Surveyor
[email protected], terimakasih bu Cindy Hartanto
[email protected] saya mau dong bu cindy
[email protected] 
Hi Cindy ...pls share the Salary guide to [email protected] thank a`; 

function extractEmails ( text ){
    return text.match(/(?:[a-z0-9+!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/gi);
    }
     
    $("#emails").text(extractEmails(text));
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
<p id="emails"></p>

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