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POJavascript sub methods / namespacing with constructor functions
 

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  1. POJavascript sub methods / namespacing with constructor functions
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    <p><strong>I cannot thank you enough for your time and help!</strong> I've searched for almost 2 days and cannot find my exact answer. To begin:</p> <p>I've always used object literal notation to create my objects. However, I've recently come across a situation where I need to create multiple instances of the same object. I believe what I'm attempting to create are "constructor functions":</p> <p>I need to have the ability to create multiple "Window" objects:</p> <pre><code>var window1 = new Window(); var window2 = new Window(); var window3 = new Window(); </code></pre> <p>I want the ability to be able to organize methods as such:</p> <pre><code>window1.errorMessage.show(); window2.errorMessage.hide(); window3.errorMessage.hide(); </code></pre> <p>Instead of something like:</p> <pre><code>window1.showErrorMessage(); window2.hideErrorMessage(); window3.hideErrorMessage(); </code></pre> <p><strong>An example of how I would build my window object in literal notation:</strong></p> <pre><code>var Window = { id: null, init : function(id) { this.id = id; }, errorMessage : { show : function(message) { // jquery that will simply take the id of this window, // find the errorMessage html element within the window, // insert the "message" and show it. }, hide : function() { // jquery that will simply take the id of this window, // find the errorMessage html element within this window and hide it. } } } </code></pre> <p><strong>An example of how I would attempt to build my window object using constructor functions and prototyping:</strong></p> <pre><code>function Window(id) { this.id = id; this.errorMessage = function() {} } Window.prototype.errorMessage = function() {} Window.errorMessage.prototype.show = function(message) { // jquery that will simply take the id of this window, // find the errorMessage html element within the window, // insert the "message" and show it. } Window.errorMessage.prototype.hide = function() { // jquery that will simply take the id of this window, // find the errorMessage html element within this window and hide it. } </code></pre> <p><strong>When I attempt to execute the following code:</strong></p> <pre><code>var window1 = new Window(); window1.errorMessage.show('An error message'); </code></pre> <p>(Ultimately I would like to call it using:)</p> <pre><code>this.errorMessage.show('An error message'); </code></pre> <p>I receive the following console errors from Firefox:</p> <ul> <li>TypeError: Window.errorMessage is undefined</li> <li>TypeError: Window.errorMessage.show is not a function</li> </ul> <p><br> <br> <br></p> <p><strong>Thank so much for you help. I appreciate it.</strong></p>
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    1. COJust as a suggestion, don't use `Window` - it's already an interface: https://developer.mozilla.org/en-US/docs/Web/API/Window
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    2. COYou are assigning the property `errorMessage` to `Window.prototype`, but then are trying to access `Window.errorMessage`, which does not exist.
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    3. COOh, I definitely won't use "Window" in the end. I was just attempting to simplify what I'm attempting to achieve. But thanks :)
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