fluid.demands()

Section
Column width 70% Registers a specification for resolving the invocation of a particular function name in a given context. Code Block javascript bgColor white borderStyle none javascript fluid.demands(functionName, context, demandsSpec/argsArray);

{code} *

File

name:

* {{

FluidIoC.js

}} h2. Parameters {span:class=borderless-table} | {{{*}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{*}}} |

Parameters Span class borderless-table 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] | {span} h2. Return Value {span:class=borderless-table} | *None* | | {span} {column} {column:width=5%} {column} {column} h3. See Also * [fluid.initDependents] * [fluid.defaults] * [Demands Specifications] * [API] {column} {section} ---- h3. Notes h4. Contexts {excerpt-include:Contexts|nopanel=true} 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]. h4. Demands Specification The 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:class=borderless-table} | {code:javascript}

Specification Return Value Span class borderless-table None   Column width 5% Column See Also fluid.initDependents fluid.defaults Demands Specifications API

---

Notes

Contexts

For more detailed information about contexts, see Contexts.

Demands Specification

The 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:

{
    funcName: "functionName",
    args: [array of arguments]
}

Example

fluid.demands(
    "my.component",
    "my.application",
    {
        funcName: "my.componentImpl",
        args: ["{application}.model", "{application}.options.strings"],
    });

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.