Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
Kevin Dunn
6,623 Pointscreating const inside of event handler
Why is it that Guil created the variables inside the event handler instead of creating all the variables together outside the event handler like so:
const form = document.getElementById('registrar');
const input = form.querySelector('input');
const text = input.value;
const ul = document.getElementById('invitedList');
const li = document.createElement('li');
form.addEventListener('submit', function(e){
input.value = '';
e.preventDefault();
ul.appendChild(li);
});
is there much of a difference?
4 Answers
David Kanwisher
9,751 PointsIf we were to assign the variable to the text input value OUTSIDE of the function (like in the example above) our variable will be empty string, since our input will always be blank on page load. Our event handler would always append an empty list item.
Ronald Lira
12,217 PointsAny idea why he used const instead of let inside the event handler?
nfs
35,526 Pointsthank you...
Roudy Antenor
4,124 PointsGreat question and great response -Thanks it helped me too!
Dan Poynor
Data Analysis Techdegree Graduate 62,953 PointsI think he used const instead of let inside the event handler because the value is only set once per each submit event.
Kevin Dunn
6,623 PointsKevin Dunn
6,623 PointsI think I figured out why. Thanks