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Setting the tooltip to fade in and out


From:

Create a Tooltip with jQuery

with Chris Converse

Video: Setting the tooltip to fade in and out

Next we're going to add a fading effect, so when we rollover an HTML element with our tooltip class, we're going to fade the tooltip in, then allow it to move with the mouse and then fade it out on mouseout. So to add in this behavior, let's come up to the mouseover function inside of the JavaScript file, let's come down to where we're setting tooltip_container display to 'block' on mouseover, and what we're going to do in here is set an additional CSS property. Now to set more then one CSS property, we need to put the properties inside a set of brackets, inside of the parentheses for CSS.
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Watch the Online Video Course Create a Tooltip with jQuery
54m 23s Intermediate Aug 28, 2012

Viewers: in countries Watching now:

Tooltips can greatly improve the usability of your web site by providing direction and cues to visitors. In this course, Chris Converse shows how to convert text or graphics into a mouse-sensitive tooltip. The tutorials demonstrate how to write the necessary HTML and activate the tooltip with jQuery, as well as add positioning and effects.

Topics include:
  • Saving web graphics from Photoshop
  • Creating the tooltip container
  • Adding the jQuery $(document).ready() and mouse events
  • Detecting and setting HTML-based tooltips
  • Attaching the tip container to the mouse
  • Setting the tooltip to fade in and out
  • Accounting for other CSS-positioned elements
Subjects:
Developer Web
Software:
jQuery
Author:
Chris Converse

Setting the tooltip to fade in and out

Next we're going to add a fading effect, so when we rollover an HTML element with our tooltip class, we're going to fade the tooltip in, then allow it to move with the mouse and then fade it out on mouseout. So to add in this behavior, let's come up to the mouseover function inside of the JavaScript file, let's come down to where we're setting tooltip_container display to 'block' on mouseover, and what we're going to do in here is set an additional CSS property. Now to set more then one CSS property, we need to put the properties inside a set of brackets, inside of the parentheses for CSS.

So after the beginning parentheses, let's put in a beginning bracket, get your cursor before the ending parentheses, and put in an ending bracket, and then we'll come back and change that comma to a colon. So the first property we're setting is display, let's hit a comma, two more tick marks for another string literal, let's put opacity, outside of the string literal, colon 0. So what we're doing here is in addition to setting the display to 'block,' so that it actually shows up in the page, we're setting the transparency to 0, so we can't see it yet.

Then outside of the parentheses for CSS and before the semicolon, we're going to add another jQuery statement, .animate, beginning and ending parentheses. Inside of the parentheses we'll add a beginning and ending bracket. Inside of the brackets we want to animate the opacity setting, so we'll type opacity:1, then outside of the brackets but still inside of the parentheses, comma 250 milliseconds. So on mouseover we're going to set the display to block, set the opacity to 0, and then animate the opacity up to 1 or 100% over the course of one quarter of the second.

Now to fade our tooltip back out, let's scroll down in our JavaScript file, let's find the mouseout function, let's add a few returns in here. So this particular statement here tooltip container that sets the display to none, once we set the display to none, the tooltip is just going to pop off the screen. It's not going to actually animate down, so we're going to need to animate the opacity back down to 0 and then set the display to 'none.' So to do this let's add few Returns above the tooltip_container. Let's start by targeting the tooltip_container again, so dollar sign, parentheses, tick marks for string literal, pound sign, tooltip_ container, outside of the parentheses .animate. Now let's add a parentheses, then a semicolon inside of animate, beginning and ending bracket, opacity:0, outside of the brackets, comma 250 for 250 milliseconds. Then we're going to hit another comma, type in the word function, another set of parentheses, another set of brackets, and then let's split that open on the brackets.

So this function here is referred to as a callback function. So what this means is after the animation happens over 250 milliseconds, anything we put inside of here will then be executed. So we're going to want to come down here and cut this line that sets the display to 'none,' come inside of this callback function and then paste that in here. So the display setting to none will not happen until after the tooltip animates back down to 0. So to test this, let's hit Save, make sure all your files are saved. Let's come back to our operating system and let's reload this in our browser.

So now inside the browser, I'll rollover a tooltip trigger, the tooltip fades in, moves with my mouse and then fades away when I move out, and this works for all of the tooltips on the screen. So that completes adding a tooltip into your website with jQuery. In the next movie, we'll talk about some CSS properties that may interfere with having elements track with the mouse and how you can correct for that.

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