Lets build a Email Extractor With the Knowledge of Regex in JavaScript.

Hello everyone hope you are all doing well, My name is Surya L.

The aim of this blog is to build a Email Extractor With the Knowledge of Regex in JavaScript.

Prerequisite:

• Basic JavaScript
• Regular/Regex Expression : To Learn Regex if you don't know do click here.

Program build a Email Extractor in JavaScript.

const emailExtractor=(text)=>{
     let emailIds = text.match(
      /([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi
    ); 
    return emailIds;
}
console.log(emailExtractor("bhsdbknhjdbhkjnldsjhbdfk@yahoo.jh ss@yahoo.com dajfguydcbxheydfsgv shdd@gmail.com"));

The Output for the above Code is :

["bhsdbknhjdbhkjnldsjhbdfk@yahoo.jh", "ss@yahoo.com", "shdd@gmail.com"]

Explanation:

• We created a function known as emailExtractor which takes text as parameter(value).

• Variable emailIds will match /([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi

• In which flag - i is used to ignore Uppercase and lowercase and match the value.

• To search or extract a pattern more than once,we use the global search flag: g.

• /([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi Is divided into 3 parts.

• [a-zA-Z0-9._-] matches Alpha Numeric Values Basically Alphabets and Numbers.

• @[a-zA-Z0-9._-]The start of the text/value should start with @ symbol and matches Alpha Numeric Values Basically Alphabets and Numbers.

• .[a-zA-Z0-9_-] The start of the text/value should start with . symbol and matches Alpha Numeric Values Basically Alphabets and Numbers.

• And By adding all three values we get email values like shdd@gmail.com.

• Finally we return the value of emailIds variable with return keyword.

To Extract Special email extension like @gmail.com

const emailExtractor=(text)=>{
     let emailIds = text.match(
      /([a-zA-Z0-9._-]+@[gmail]+\.[a-zA-Z0-9_-]+)/gi
    ); 
    return emailIds;
}
console.log(emailExtractor("bhsdbknhjdbhkjnldsjhbdfk@yahoo.jh ss@yahoo.com dajfguydcbxheydfsgv shdd@gmail.com"));

The output of above Code is ["shdd@gmail.com"] Thanks for reading the blog. Do let me know what you think about it.

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