fluid.demands()| Section |
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| Registers a specification for resolving the invocation of a particular function name in a given context. | Code Block |
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fluid.demands(functionName, context, demandsSpec/argsArray);
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File name: FluidIoC.js Parameters| Span |
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| functionName | (String) the name of the function demand which this specification matches. | context | (String or Array of Strings) the name(s) of the context(s) in which this demand specification applies. See #Contexts below for more information. | demandsSpec/argsArray | (Object)/(Array) the actual demands specification to be applied in the case this rule matches. If the functionName does not require to be replaced by another, it is sufficient just to list an Array of the replacement arguments. Otherwise, this argument can be a full #Demands Specification |
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Return Value |
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NotesContexts| Insert excerpt |
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| Contexts |
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| nopanel | trueContexts |
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The context parameter to fluid.demands specifies a name for particular context in which the supplied demands are intended to be valid.For more detailed information about contexts, see Contexts. Demands SpecificationThe third parameter to fluid.demands(), spec, is the demands specification that declares how the function invocation is to be disposed, in the case that the overall block matches. This parameter can take one of several possible forms: | Span |
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{
funcName: "functionName",
args: [array of arguments]
}
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| The array of arguments can contain references to any value-resolved material, as may also appear in fluid.defaults blocks |
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Example| Code Block |
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fluid.demands(
"my.component",
"my.application",
{
funcName: "my.componentImpl",
args: ["{application}.model", "{application}.options.strings"],
});
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In this example, the component my.component is specifying its requirements when used in the context of my.application. The request is that the component be instantiated using a function called my.componentImpl, passed the args array as a parameter. When the IoC system fulfills the demands, the model property and the options.strings property of the my.application object will be retrieved and inserted in the args array before the function is called. |