Read time calulator

by Sam Wray

HTML

<textarea>
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</textarea>
<div></div>

JavaScript

var $ = document,
    txtarea = $.getElementsByTagName('textarea')[0],
    minutesDiv = $.getElementsByTagName('div')[0];

function calcReadMinutes(inputWords) {
    var words = inputWords.trim().split(" "),
        noWords = words.length;
    // Average WPM is 200-250
    var speed = Math.floor(Math.random() * (250 - 200 + 1)) + 200;    
    return noWords / speed;
}

txtarea.addEventListener('input', function() {
    var minutes = calcReadMinutes(this.value);
    minutes =  Math.floor(minutes);
    if(minutes < 1) minutesDiv.textContent = '< 1';
    else if(minutes > 60) minutesDiv.textContent = '> 60';
    else minutesDiv.textContent = minutes;
});