Text Animations

When I saw Aurelio De Rosa’s tutorial on writing a jQuery plugin I bookmarked it. What caught my eye was the title “Flashing Text Effect”. No idea why, but as I read the article and worked through the tutorial I envisioned it being used in a header with a background image. And what if that background image changed as well?

I made one change to his code. I want to be able to specify the size of the text: random, normal (unchanging and inheriting the font-size from you page) or a specific, unchanging font size. This required two additions to his code. First, adding a default value:

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var defaultValues = {
      strings: [], // array. A set of strings to show.
      //My addition here:
      fontSize: 'normal', //string.  "normal" = no resizing. "random"= random resizing. Or enter size in px or ems (16px; 1.5em)
      //End my addition
      fadeIn: 300, // numeric. The time in milliseconds the element appears by fading to opaque.
      duration: 500, // numeric. The time of milliseconds the element stays visible.
      fadeOut: 300, // numeric. The time of milliseconds the element disappears by fading to transparent.
      selection: "random" // string. The order of selection of the strings.
                          // The possible values are: "random", "ascending", "descending".
   };</p>
<p>

Then, under the start method I added:

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start: function(settings, index, idElem)
      {
         if (typeof idElem === "undefined") {
            idElem = this.selector;
         }
         if (typeof settings === "undefined") {
            $.error("Invalid method call: No settings specified");
            return;
         }
         if (index == null) {
            if (settings.selection === "ascending")
               index = 0;
            else if (settings.selection === "descending")
               index = settings.strings.length - 1;
            else
               index = Math.floor(Math.random() * settings.strings.length);
         }</p>
<p>		//My additions here
                //determine if we are resizing font or not
		var fs = "1 em";
		if(settings.fontSize == 'random') {var fs = (Math.random() * 2 + 0.5) + "em";}else if (settings.fontSize != 'normal'){ var fs = settings.fontSize;}
                //endadditions
<p>         var $text = $("<span>")
         .text(settings.strings[index])
         .addClass("audero-flashing-text") // This is used as a bookmark to help the stop method
         .css({
            position: "absolute",
            display: "none",
            fontSize: fs  //my addition
         })
         .appendTo("#" + idElem)
         .fadeIn(settings.fadeIn)
         .animate({opacity: 1}, settings.duration) // Simulate delay
         .fadeOut(settings.fadeOut, function() {
            // Remove the current element
            $(this).remove();
            var nextIndex;
            if (settings.selection === "ascending")
               nextIndex = (index + 1) % settings.strings.length;
            else if (settings.selection === "descending")
               nextIndex = (index === 0) ? settings.strings.length : index - 1;
            else
               nextIndex = Math.floor(Math.random() * settings.strings.length);
            // Start again the effect
            methods.start(settings, nextIndex, idElem);
         });

I handled the background image changer with a slick little plugin called cross-slide.js


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