githubmirror/impress.js

index.html
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Bartek Szopka
even more impressive docs
25 янв 2012, 03:16
25 янв 2012, 03:16a6970d1
<!doctype html>

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<!--
    
    So you'd like to know how to use impress.js?
    
    You've made the first, very important step -- you're reading the source code.
    And that's how impress.js presentations are built -- with HTML and CSS code.
    
    Believe me, you need quite decent HTML and CSS skills to be able to use impress.js effectively.
    And what is even more important, you need to be a designer, too, because there are no default
    styles for impress.js presentations, there is no default or automatic layout for them.
    
    You need to design and build it by hand.
    
    So...
    
    Would you still like to know how to use impress.js?
    
-->

<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>impress.js | presentation tool based on the power of CSS3 transforms and transitions in modern browsers | by Bartek Szopka @bartaz</title>
    
    <meta name="description" content="impress.js is a presentation tool based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.">
    <meta name="author" content="Bartek Szopka" />

    <link href="http://fonts.googleapis.com/css?family=Open+Sans:regular,semibold,italic,italicsemibold|PT+Sans:400,700,400italic,700italic|PT+Serif:400,700,400italic,700italic" rel="stylesheet" />

    <!--
        
        Impress.js doesn't depend on any external stylesheet. Script adds all styles it needs for
        presentation to work.
        
        This style below contains styles only for demo presentation. Browse it to see how impress.js
        classes are used to style presentation steps, or how to apply fallback styles, but I don't want
        you to use them directly in your presentation.
        
        Be creative, build your own. We don't really want all impress.js presentations to look the same,
        don't we?
        
        When creating your own presentation get rid of this file. Start from scratch, it's fun!
        
    -->
    <link href="css/impress-demo.css" rel="stylesheet" />
</head>
<body>

<!--
    
    That's the wrapper for your presentation steps. In this element all the impress.js magic happens.
    It doesn't have to be a `<div>`. Only `id` is important here as that's how the script find it.
    
    It's worth to notice the `impress-not-supported` class. This class means, that browser doesn't
    support features required by impress.js, so you can apply some fallback styles in your CSS.
    It's not necessary to add it manually on this element. If the script detects that browser is not
    good enough it will add this class, but keeping it in HTML means that users without JavaScript
    will also get fallback styles.
    
    The class name on this element also depends on currently active presentation step. More details about
    it can be found below, when `hint` element is being described.
    
-->
<div id="impress" class="impress-not-supported">

    <div class="fallback-message">
        <p>Your browser <b>doesn't support the features required</b> by impress.js, so you are presented with a simplified version of this presentation.</p>
        <p>For the best experience please use the latest <b>Chrome</b> or <b>Safari</b> browser. Firefox 10 (to be released soon) will also handle it.</p>
    </div>

    <!--
        
        Here is where interesting thing start to happen.
        
        Each step of the presentation should be an element inside the `#impress` with a class name
        of `step`. These step elements are positioned, rotated and scaled by impress.js, and
        the 'camera' shows them on each step of the presentation.
        
        Positioning information is passed through data attributes.
        
        In the example below we only specify x and y position of the step element with `data-x="-1000"`
        and `data-y="-1500` attributes. This means that **the center** of the element (yes, the center)
        will be positioned in point x = -1000px and y = -1500px of the presentation 'canvas'.
        
        It will not be rotated or scaled.
        
    -->
    <div id="bored" class="step slide" data-x="-1000" data-y="-1500">
        <q>Aren't you just <b>bored</b> with all those slides-based presentations?</q>
    </div>

    <!--
        
        The `id` attribute of the step element is used to identify it in the URL, but it's optional.
        If it is not defined, it will get a default value of `step-N` where N is a number of slide.
        
        So in the example below it'll be `step-2`.
        
        The hash part of the url when this step is active will be `#/step-2`.
        
        You can also use `#step-2` in a link, to point directly to this particular step.
        
        Please note, that while `#/step-2` (with slash) would also work in a link it's not recommended.
        Using classic `id`-based links like `#step-2` makes these links usable also in fallback mode.
        
    -->
    <div class="step slide" data-x="0" data-y="-1500">
        <q>Don't you think that presentations given <strong>in modern browsers</strong> shouldn't <strong>copy the limits</strong> of 'classic' slide decks?</q>
    </div>

    <div class="step slide" data-x="1000" data-y="-1500">
        <q>Would you like to <strong>impress your audience</strong> with <strong>stunning visualization</strong> of your talk?</q>
    </div>

    <!--
        
        This is an example of step element being scaled.
        
        Again, we use a `data-` attribute, this time it's `data-scale="4"`, so it means that this
        element will be 4 times larger than the others.
        From presentation and transitions point of view it means, that it will have to be scaled
        down (4 times) to make it back to it's correct size.
        
    -->
    <div id="title" class="step" data-x="0" data-y="0" data-scale="4">
        <span class="try">then you should try</span>
        <h1>impress.js<sup>*</sup></h1>
        <span class="footnote"><sup>*</sup> no rhyme intended</span>
    </div>

    <!--
        
        This element introduces rotation.
        
        Notation shouldn't be a surprise. We use `data-rotate="90"` attribute, meaning that this
        element should be rotated by 90 degrees clockwise.
        
    -->
    <div id="its" class="step" data-x="850" data-y="3000" data-rotate="90" data-scale="5">
        <p>It's a <strong>presentation tool</strong> <br/>
        inspired by the idea behind <a href="http://prezi.com">prezi.com</a> <br/>
        and based on the <strong>power of CSS3 transforms and transitions</strong> in modern browsers.</p>
    </div>

    <div id="big" class="step" data-x="3500" data-y="2100" data-rotate="180" data-scale="6">
        <p>visualize your <b>big</b> <span class="thoughts">thoughts</span></p>
    </div>

    <!--
        
        And now it gets really exiting! We move into third dimension!
        
        Along with `data-x` and `data-y`, you can define the position on third (Z) axis, with
        `data-z`. In the example below we use `data-z="-3000"` meaning that element should be
        positioned far away from us (by 3000px).
        
    -->
    <div id="tiny" class="step" data-x="2825" data-y="2325" data-z="-3000" data-rotate="300" data-scale="1">
        <p>and <b>tiny</b> ideas</p>
    </div>

    <div id="ing" class="step" data-x="3500" data-y="-850" data-rotate="270" data-scale="6">
        <p>by <b class="positioning">positioning</b>, <b class="rotating">rotating</b> and <b class="scaling">scaling</b> them on an infinite canvas</p>
    </div>

    <div id="imagination" class="step" data-x="6700" data-y="-300" data-scale="6">
        <p>the only <b>limit</b> is your <b class="imagination">imagination</b></p>
    </div>

    <div id="source" class="step" data-x="6300" data-y="2000" data-rotate="20" data-scale="4">
        <p>want to know more?</p>
        <q><a href="http://github.com/bartaz/impress.js">use the source</a>, Luke!</q>
    </div>

    <div id="one-more-thing" class="step" data-x="6000" data-y="4000" data-scale="2">
        <p>one more thing...</p>
    </div>

    <!--
        
        And the last one shows full power and flexibility of impress.js.
        
        You can not only position element in 3D, but also rotate it around any axis.
        So this one here will get rotated by -40 degrees (40 degrees anticlockwise) around X axis and
        10 degrees (clockwise) around Y axis.
        
        You can of course rotate it around Z axis with `data-rotate-z` - it has exactly the same effect
        as `data-rotate` (these two are basically aliases).
        
    -->
    <div id="its-in-3d" class="step" data-x="6200" data-y="4300" data-z="-100" data-rotate-x="-40" data-rotate-y="10" data-scale="2">
        <p><span class="have">have</span> <span class="you">you</span> <span class="noticed">noticed</span> <span class="its">it's</span> <span class="in">in</span> <b>3D<sup>*</sup></b>?</p>
        <span class="footnote">* beat that, prezi ;)</span>
    </div>

    <!--
        
        So to make a summary of all the possible attributes used to position presentation steps, we have:
        
        * `data-x`, `data-y`, `data-z` -- they define the position of **the center** of step element on
            the canvas in pixels; their default value is 0;
        * `data-rotate-x`, `data-rotate-y`, 'data-rotate-z`, `data-rotate` -- they define the rotation of
            the element around given axis in degrees; their default value is 0; `data-rotate` and `data-rotate-z`
            are exactly the same;
        * `data-scale` -- defines the scale of step element; default value is 1
        
    -->
    <div id="overview" class="step" data-x="3000" data-y="1500" data-scale="10">
    </div>

</div>

<!--
    
    Hint is not related to impress.js in any way.
    
    But it can show you how to use impress.js features in creative way.
    
    When the presentation step is shown (selected) it's element get's the class of "active" and `#impress` root
    element get's the class based on active step id `step-ID` (where ID is the step id)... It probably is not
    so clear because of all these IDs in here, so for example when the first step (the one with id of `bored`)
    is active, `#impress` element get a class of `step-bored`.
    
    This class is used by this hint below. Check CSS file to see how it's shown with delayed CSS animation.
    
-->
<div class="hint">
    <p>Use a spacebar or arrow keys to navigate</p>
</div>


<!--
    
    Last, but not least.
    
    To make all described above really work, you need to include impress.js in the page.
    And you should do it in the end of your document. Not only because it's a good practice, but also
    because I was lazy, haven't wrapped the code in any kind of "DOM ready" event, so it will not work
    if included too early in the source ;)
    
-->
<script src="js/impress.js"></script>

</body>
</html>

<!--
    
    Now you know more or less everything you need to build your first impress.js presentation, but before
    you start...
    
    Oh, you've already cloned the code from GitHub?
    
    You have it open in text editor?
    
    Stop right there!
    
    That's not how you create awesome presentations. This is only a code. Implementation of the idea that
    first needs to grow in your mind.
    
    So if you want to build great presentation take a pencil and piece of paper. And turn off the computer.
    
    Sketch, draw and write. Brainstorm your ideas on a paper. Try to build a mind-map of what you'd like
    to present. It will get you closer and closer to the layout you'll build later with impress.js.
    
    Get back to the code only when you have your presentation ready on a paper. It doesn't make sense to do
    it earlier, because you'll only waste your time fighting with positioning of useless points.
    
    If you think I'm crazy, please put your hands on a book called "Presentation Zen". It's all about 
    creating awesome and engaging presentations.
    
    Think about it. 'Cause impress.js may not help you, if you have nothing interesting to say.
    
-->

<!--
    
    Are you still reading this?
    
    For real?
    
    I'm impressed! Feel free to let me know that you got that far (I'm @bartaz on Twitter), 'cause I'd like
    to congratulate you personally :)
    
-->