When I interview web developers, I always like to ask the following basic Javascript question:
Write a function in Javascript that will ‘toggle’ or show/hide an element upon being fired.
function toggle(elementIdValue) {
}
I typically see one of two answers: Jquery or classic JavaScript. Both of course are effective. But, in this article I'm going to demonstrate another way as well.
Both work to accomplish the task at hand; however, I don't like the idea of using toggle or the old school JavaScript route when I want to know if the element is visibile. Jquery offers one other nice solution. Let's rewrite example two above to use it: Or rather than using visible you could use the opposite – hidden – to detect if it is not visible. Image courtesy of Sweetie187 Published on Sep 26, 2012 Tags: visible
| hidden
| toggle
| jQuery Tutorial
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Jamie Munro is the author of ASP.NET MVC 5 with Bootstrap and Knockout.js,
Knockout.js: Building Dynamic Client-Side Web Applications,
20 Recipes for Programming MVC 3,
and 20 Recipes for Programming PhoneGap. He has been developing websites and web applications for over 20 years. Jamie began his writing career in 2009. As the success of Jamie's blog grew, he turned his writing passion to books about web development in hopes that his many years of experience could be passed on to his readers. No matter the programming language you're looking to learn, I've hopefully compiled an incredible set of tutorials for you to learn; whether you are beginner
or an expert, there is something for everyone to learn. Each topic I go in-depth and provide many examples throughout. I can't wait for you to dig in
and improve your skillset with any of the tutorials below.
function toggle(elementIdValue) {
$(elementIdValue).toggle()
}
function toggle(elementIdValue) {
if (document.getElementById(elementIdValue).style.display == "none")
document.getElementById(elementIdValue).style.display = "block";
else
document.getElementById(elementIdValue).style.display = "none";
}
function toggle(elementIdValue) {
if ($(elementIdValue).is(":visible"))
$(elementIdValue).hide();
else
$(elementIdValue).show();
}
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