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January 12, 2015 11:50
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Javascript FACADE PATTERN
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/* | |
○ Building blocks for writing modules. | |
○ A façade is a high level interface to a larger code base that hides the underlying code complexity. | |
○ The facade exposes an application programming interface (API) which limits the available functionaity we can use and helps encapsulate a lot of the interior code behavior. | |
Façade Pattern Structure in JavasScript | |
• the function returns an object | |
• the object acts a a façade to the inner implementation , which is encapsulated. | |
*/ | |
var car = (function () { | |
//object inner implemenation | |
var speed = 0; | |
function driveFaster() { | |
speed += 10; | |
} | |
function printSpeed() { | |
console.log(speed); | |
} | |
return { | |
// exposed façade API | |
drive: function(newSpeed) { | |
while (speed < newSpeed) { | |
driveFaster(); | |
printSpeed(); | |
} | |
}; | |
}()); | |
//hitting that exposed façade API function… car.drive() is exposed. | |
car.drive(80); // output to the console 10, 20, …80 |
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