JSFiddle - React, Tailwind, and code Playground

HTML

<textarea></textarea>
<button>Submit</button>
<p>dgfg</p>

JavaScript

$('button').click(function(){
    var links = $('textarea').val().split('\n');
    
    $.each(links,function(){
        if( this.substr(0, 7) == 'http://' )
            $('p').after(this);
        else
            $('p').after('error: '+this+'<br/>');
    });
    return false;
});