JSFiddle - React, Tailwind, and code Playground

HTML

<input id="boldText" type="text"/>
<p id="printScreen"></p>

CSS

#printScreen{
    font-weight:bold;
}

JavaScript

$('#boldText').on('keydown',function(){
    var Text = $('#boldText').val();
    if(Text.indexOf('#')!=-1){
        var index=Text.indexOf('#');
        var newLine = Text.substring(index,Text.length);
        $('#printScreen').html(newLine);
    }
});