JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="txt_area_in_question">Some text

    Some more text





    Some more text



</textarea>

JavaScript

var my_data = document.getElementById("txt_area_in_question").value;
my_data = my_data.split("\n\n");
var g = my_data.length;
var i = 0;
var strip_whitespace = /\s+/gi;
while (g >=0) {
    g--;
    var tmp = my_data[g];
    tmp = tmp ? tmp .replace(strip_whitespace,"") : tmp;
    if( tmp && tmp.length > 1 ) {
        i++;
    }
}
alert("The total paragraphs in the text area are: "+i);