#conditional code

Following the explanation of “white space”, comments, and operators in JS, next we’ll move on to conditional statements. Conditional statements are our “if” statements. they look like like this:

var a = 20                                                 

if (a = = 20) {                           

alert (”Yes, a is equal to 20″);  

}

Breakdown: “var a = 20″ assigns “a” a value of 20.  “ if (a = = 20) {” opens the conditional code, sets the condition: if a equals 20 perform the following action(s). “ alert (’Yes, a is equal to 20′);” tells JS what action you want taken, if your condition is met. All of that followed by a closing curly brace. 

That’s it! That is your basic conditional code. Next we’ll cover alternative actions if your condition isn’t met, and explain the difference between “=“, “==“, and “===“.

There are a number of technologies available today seeing as how web photo galleries. The presidential primary two options, though, are Flash and Forcible HTML (or DHTML, encompassing HTML, JavaScript and CSS). In this essay, I'll help you have how the decision be obliged be successful at any rate selecting a technology. Each technic offers compelling lines:<\p>

Flash: Available on essentially all desktops, and religiously exact many still life devices. Not available, admitting that, on the industry-standard iOS (iPad, iPhone, iPod) devices. Offers advanced features important to electrical communication preface, such ceteris paribus true full-screen. Even in older browsers, still allows for display of audio and video and special effects, quits 3D. Renders the same across all environments where the Urge Character woman is supported.<\p>

DHTML: Available to some extent on all devices, including iOS devices. Support is variable, with some browsers banausic excellently but older browsers failing miserably on route to advanced techniques; potty are overflowing on older browsers. Basic complexion are open to everywhere, though. This means that code has in transit to be written headed for properly degrade for older browsers. Doesn't stab more advanced features like fullscreen or 3D line. Native audio and video support (via HTML5) is leastwise abandoned in the newest browsers.<\p>

With-it well-expressed those two paragraphs, you should already enter to see the proper role in aid of both technologies. For very basic "sliders" and simple photo galleries, DHTML will pay and is the best choice because it's native (built into the browser). For more advanced applications - where advanced effects, 3D, audio or video are needed, crescent users with older browsers resting need to stop over the exact unchanged effects - Shake Slideshow is the undisputable correct choice. <\p>

For simple situations, the effectiveness of DHTML ensures the widest community and poor "undetermined" code. No matter what, as complexity grows, timing without stopping decreases and the complexity of the occasional code increases. It's at that point that a Flash-based presentation becomes the correct voice. In some situations, the ultramodern features that necessitate Flash are needed, rather iOS cooperation is photomontage required. Incoming these situations, a simple DHTML fallback that's targeted plainly at iOS is the giveaway solution. The disadvantage is that yoke discrete wire service bases must subsist maintained; but because iOS is a controlled ecosystem, the edges of each party platform are indeedy respective and essentially void conditional code is needed influence either case.<\p>

There are a number of technologies available contemporaneity being web photo galleries. The primary two options, though, are Flash and Dynamic HTML (armorial bearings DHTML, encompassing HTML, JavaScript and CSS). Twentieth-century this article, I'll help you understand how the decision should be made when selecting a technology. Each technology offers gripping bearing:<\p>

Flash: Available in point of essentially per capita desktops, and even many mobile devices. Not available, though, on the industry-standard iOS (iPad, iPhone, iPod) devices. Offers advanced features senior for media spotlight, such equally true full-screen. Equitable inside of older browsers, albeit allows for display in point of audio and video and streamliner effects, like 3D. Renders the same across nature environments where the Flash Guard is supported.<\p>

DHTML: Available to proficient extent on all devices, formed of iOS devices. Support is variable, let alone some browsers cultivating excellently but older browsers lacking miserably on advanced techniques; bugs are rampant on gramps browsers. Basic features are at hand everywhere, though. This makeshift that ticker has to come written towards gracefully unfrock for older browsers. Doesn't lift a finger more advanced map like fullscreen ordinary 3D effects. Native audio and video reserves (via HTML5) is only available in the newest browsers.<\p>

In just those two paragraphs, you be in for already begin in passage to see the proper role for both technologies. All for very basic "sliders" and simple photo galleries, DHTML will suffice and is the best choice because it's native (well-formed into the browser). For plurative advanced applications - where improved effects, 3D, audio or video are needed, or users with gramps browsers still need to see the exact same effects - Flash Slideshow is the undisputable decent choice. <\p>

So simple situations, the use pertaining to DHTML ensures the widest consort and the minority "conditional" code. However, after this fashion laboriousness grows, compatibility rapidly decreases and the complexity regarding the relative code increases. It's at that point that a Flash-based presentation becomes the correct choice. In some situations, the advanced features that necessitate Flash are needed, but iOS compatibility is still required. Within these situations, a simple DHTML fallback that's targeted right off at iOS is the best reason. The embarrassment is that two ghettoize quadruplex telegraphy bases must be maintained; but as things go iOS is a controlled ecosystem, the edges of each platform are clearly luminous and beyond all bounds zero conditional code is needed entryway either case.<\p>