When working with Javascript Object literals, I am facing an issue where string attributes cannot be concatenated properly.
var cart = {
baseURL : "http://www.domain.com/",
addURL : this.baseURL + "cart/add",
deleteURL : this.baseURL + "cart/delete",
totalURL : this.baseURL + "cart/total",
// functions
}// cart
As a result, the link generated is
http://www.domain.com/undefinedcart/addI would really appreciate any guidance on how to resolve this issue. Thank you in advance.
The access to the baseURL is not straightforward in this scenario. The reason for this is that instead of referring to this, which would normally be the containing object, you are actually referencing the global window object, which may not have the property baseURL.
To solve this issue, you can utilize an Immediately-Invoked Function Expression (IIFE) and closures as follows:
var cart = function () {
var baseURL = "http://www.example.com/";
return {
addURL : baseURL + "cart/add",
deleteURL : baseURL + "cart/delete",
totalURL : baseURL + "cart/total"
};
}();
The issue lies not in concatenation within the object's context, but rather in the absence of the this reference you seek. A straightforward remedy could take the following form:
var baseURL = "http://www.mywebsite.com/";
var cart = {
baseURL : baseURL,
addURL : baseURL + "cart/add",
deleteURL : baseURL + "cart/delete",
totalURL : baseURL + "cart/total",
}
Alternatively, consider this approach:
var cart = new function() {
this.baseURL = "http://www.mywebsite.com/";
this.addURL = this.baseURL + "cart/add";
this.deleteURL = this.baseURL + "cart/delete";
this.totalURL = this.baseURL + "cart/total";
};
When referring to the variable "this", it is important to note that it is an instance of the Window object and cannot be used interchangeably with the "cart" parameter.
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