A vital issue to notice about the void operator is the fact that it requires a price and can't be utilized by alone. We must always use it like this:
The void operator is often a unary operator that normally takes an argument and returns undefined. So var x = void 42; means x === undefined. This is helpful due to the fact, outside of strict manner, undefined is really a sound variable identify.
From what I have observed, the void operator has three typical works by using in JavaScript. The 1 that you are referring to, is a standard trick to produce an tag a no-op. Some browsers take care of tags differently determined by whether or not they Possess a href , so this is the way to create a connection that has a href that does almost nothing.
Putting the "#" symbol as the href for one thing signifies that it details not to a different URL, but alternatively to another id or identify tag on the exact same website page. As an example:
In order to utilize it for a picture, the tag can tackle the placed in it much like other standard cases with :
For those who really need a component that may not a link but which may be activated as normal by mouse or keyboard, what you want can be a (or is just as very good, for easy textual contents).
The problem with applying href="#" for an vacant connection is that it'll just take you to the highest on the web site which is probably not the desired motion.
It's really a way of creating a link do Definitely nothing when clicked (Until Javascript events are certain to it).
The downside of this is that you eliminate keyboard control, because you cannot tab on to a span/div/bare-a or activate it with House. Regardless of whether this is definitely a disadvantage is determined by what type of motion the component is intended to acquire.
This is effective high-quality but it surely can make the website page scroll to the highest since the # within the href tells the browser to do this.
Has the similarity involving diagrams of the increasing universe and of vapour tension in mixtures been mentioned by Some others? Is this just coincidence?
new revision so that you can see the behavior when you have scroll bar around the browser: jsbin.com/ipoda3/2
You may then change your component's href to jump to middleOfPage and execute the JavaScript inside check here the onClick function:
Use of javascript:void(0) implies that the author of your HTML is misusing the anchor aspect instead of the button element.
I know iPhone quickly acknowledges cellphone quantities and produces a connection for this, but It will be excellent if this could be performed for photos much too... and in addition for most cell devices.