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Setting a caption based on the child in focus

From: Create a Rotating Carousel with jQuery and Dreamweaver

Video: Setting a caption based on the child in focus

Now that we have the showCaption function working properly and we have the carousel calling back the child that's in focus, let's come back over to carousel.js and let's modify the showCaption function to update the actual caption area. So inside of showCaption, inside of the alert, let's grab this statement that actually gets the child in focus. Let's cut that to the clipboard, and let's get rid of the alert. Instead, let's type var. We are going to create a variable inside of here, childInFocus, and we are going to set that equal to and let's paste in that statement.

Setting a caption based on the child in focus

Now that we have the showCaption function working properly and we have the carousel calling back the child that's in focus, let's come back over to carousel.js and let's modify the showCaption function to update the actual caption area. So inside of showCaption, inside of the alert, let's grab this statement that actually gets the child in focus. Let's cut that to the clipboard, and let's get rid of the alert. Instead, let's type var. We are going to create a variable inside of here, childInFocus, and we are going to set that equal to and let's paste in that statement.

Let's add another line. Let's add a second variable. This is going to be called setCaption, and we are going to set that equal to dollar sign, beginning and ending parentheses, inside of the parentheses two tick marks for a string literal .carousel_data, space, .carousel_item, space, .caption, and a colon.

And then we are going to type eq, beginning and ending parenthesis. Inside of the parenthesis we are going to type two single tick marks. Inside of the tick marks we are going to put in two plus signs, and then we are going to come up here and grab the childInFocus variable name, copy that, and paste it inside. What this is going to do is find the childInFocus, which is going to return a number that we saw in the last movie where the alert was telling us the number of the childInFocus. We are then going to go into carousel_ data, find the carousel_item with the caption the same number child, which is equal to sign here, that matches the carousel item of the childInFocus.

Once we have that particular child, outside of the parentheses, we are going to type .html, beginning and ending parenthesis, and a semicolon. So now we are pulling the html data from that individual caption, again, that matches the childInFocus of the carousel. Now that we have the HTML stored in a variable, let's add another line, dollar sign, beginning and ending parenthesis, two tick marks inside for a string literal. Let's type pound captions. We are going to search for the caption id that's actually inside of the myCarousel container .html, beginning and ending parentheses, semicolon, and the HTML that we are going to set is going to be the set caption variable.

Let's copy that to the clipboard and paste that inside of here. So once we define the setCaption based on the item of the child that matches the childInFocus from the carousel, we are going to take the caption's id and set the html to the setCaption variable. To test this, we will choose File > Save All > carousel.html. Let's come down to Preview in Browser again, and now in the browser when I come over here and click on one of the teapots, once the first teapot comes in focus and we run the showCaption function, you will see that the corresponding caption now shows up in the caption area.

This works for any teapot that I click. Now that the captions are being populating, you might notice there is a slight little gap here between the stem and the leaves. In the next movie, we will add some CSS styling to tighten up the caption area, and then we can work on the animation states for the caption.

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