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{
	"name": "packagename-componentname", // String
	"displayName": "more descriptive name that is shown in the designer", // String
	"version": the component version (integer)
	"icon": "A reference to the icon shown in designer" ,
    "preview": "A reference to the preview gif to be displayed" ,

	"definition": "A reference to the js file that implements this component's in the browser",
    "serverscript": "[optional] A reference to the js file that implements this component's server-side logic, if any.",
	"doc": "[optional] A reference to the js file that contains the jsdocs of the component api or model properties.",
    "group": true // default true, so the definition file can be grouped when creating the .war file for deployment
    "deprecated": "This component will be replaced in the next versions.", // (optional) some string to mark the component as deprecated - if it is deprecated
	"replacement": "package-compname", // (optional) in case of deprecation, developer will provide a quick fix for such components to be automatically changed to the given replacement component
                                       // (make sure they have compatible .spec defined; in most cases this is useful when moving components from a package to another package or when
                                       // rewriting a component but keeping it's contract unchanged)
	"libraries": /* Array of js/css definitions (which are JSON objects with 
                             'name'-the lib name, 'version'-the lib version, 'url'-the lib url, 
                             'mimetype'-the lib mimetype, one of 'text/javascript' or 'text/css', 
                             'group' - give false here when this lib dependency should not be grouped when exported
                             as .war; default true)
                    that need to be included for this component. */,

	"keywords": /* Array of "categoryName": "Advanced", // category for form designer palette; only makes sense for components, not services

	"model": {
	    "property1Name": keywords used for searching components in the palette.
				   For instance, for the calendar component some appropriate keywords that might be used are: "day", "month", "year"*/,

    "categoryName": "Advanced", // category for form designer palette; only makes sense for components, not services

	"model": {
	    "property1Name": /* type description (optionally including optional default value and others) */,
	    "property2Name": /* type description (optionally including optional default value and others) */
	},

	"handlers": {
	    "handler1Name": { /* handler function type definition*/ },
	    "handler2Name": { /* handler function type definition*/ }
	},

	"api": {
	    "apiFunction1Name": { */ api function signature description json*/ },
	    "apiFunction2Name": { */ api function signature description json*/ }
	},

    "internalApi" : {
	    "internalApiFunction1Name": { */ internal api function signature description json*/ },
	    "internalApiFunction2Name": { */ internal api function signature description json*/ }
    },

	"types": {
	    "customType1Name": {
            "subProp1Name": /* type description" */,
            "subProp2Name": /* type description" */
        },
	    "customType2Name": {
            "subProp1Name": /* type description" */,
            "subProp2Name": /* type description" */
       }
    }
}

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Properties can be configured with special tags that may be interpreted by the deployment and/or development environment.

Supported tags are: scope, doc,   addToElementsScope, logWhenOverMax, allowaccess, directEdit, useAsCaptionInDeveloper + captionPriority, showInOutlineView, main and mode.

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Design means property can only be assigned from designer (not from scripting). Runtime means the property cannot be assigned from designer (will be hidden in Properties View). Private is an internal property, that should only be used by component itself (so component.js or component_server.js). Will not show in Properties View and cannot be assigned from scripting.

addToElementsScope : boolean

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doc: a string (can have some basic html tags in it) that describes what the property does to the developer. See Documenting what properties do for more details.

addToElementsScope : boolean

For component type, specify whether component should be added to elements scope. Default is false, so component can be accessed only via component property. If true, will be accessible like any other element of the form.

...

When the find mode changes the boolean value of your property will also change. This way you can react to a form/foundset going into find mode. Like resetting a specific format, allowing any kind of input.

Handlers

The function description in the handlers section can be just "function" or a more complex type describing the arguments and return type

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Anchor
documentingProperties documentingProperties

Documenting what properties do

Documentation for properties can be added to each property's definition via the "tags" section using key "doc" or in the doc file using a variable with same name as the property.

/**
 * some desciption
 * @example elements.%%elementName%%.yourName = 'myname'
 */
var yourName;

The description that you provide in the .spec file will be used in Servoy Developer as:

• tooltip in properties view
• tooltip in solution explorer view
• tooltip in script editor
• any other place in developer where it can help the user of your custom component understand what that property does.

For example if you want to document a simple property called "titleText" you can do it like this:

	(...)
	"model": {
		"titleText": { "type": "intstring" },
            { "nametags": "end",{ "typedoc": "int" } 
        ],
		"private":true // since Servoy 8.3, optional, default is false
}

the private configuration makes the handler only accessible through Server Side Scripting. But not by the client/browser itself.

Api

This section defines the signatures and behaviors of functions that can be called from the solution on this component/service.

The signature description json for functions in the api section describes the arguments, type of call and return type, For example:

"someFunctionName": {
        "parameters": [
            { "name": "startIndex", "type": "int" },
            { "name": "endIndex", "type": "int" },
            {
                "name": "theData",
                "type": {
                    "type": "dataset",
                    "includeColumnNames": true,
                    "columnTypes": { "icon": "media" }
                }
 The <b>title text</b> is shown in this component's title bar (top side).<br/>Keep it short." } },
	(...)

Basic html tags are supported - similar to the ones supported when documenting methods using JSDoc (in the script editor).

Arrays, custom objects, array elements and subproperties of custom objects can be documented in the same way. For example:

	(...)
	"model": {
		"columns": {
			"type": "column[]",
			"tags": { "doc": "Define the table's columns using this property." },
			"elementConfig": {
				"tags": { "doc": "A column definition describes all that is needed to show that column properly in the table." }
			},
			(...)
		},
		(...)
	},
	"types": {
		"column": {
			"dataprovider": { "type": "dataprovider", "forFoundset": "foundset", (...), "tags": { "doc" : "Choose the data that is to be shown in this column." } ),
			"format": { "type": "format", "for": ["valuelist", "dataprovider"], "tags": { "doc" : "This format will be applied on the dataprovider's data before showing it in the table." } },
			"valuelist": { "type": "valuelist", "for": "dataprovider", "forFoundset": "foundset" },
			(...)
		},
	(...)

For information about documenting handlers see Documenting handlers and handler templates below. For information about documenting API functions see the documenting api functions example.

Handlers

The function description in the handlers section can be just "function" or a more complex type describing the arguments and return type:

"functionName": {
        "returns":  }"string",
        ] }

...

"parameters": [
            { "name": "start", "type": "int" },
            { "name": "end", "type": "int" } 
        ],
		"private": true // since Servoy 8.3, optional, default is false,
		"ignoreNGBlockDuplicateEvents": true // since Servoy 2020.12, default is false
}

The "private" configuration makes the handler only accessible from Server Side Scripting, not from the client/browser itself.
The "ignoreNGBlockDuplicateEvents" configuration makes the handler ignore the system NG_BLOCK_DUPLICATE_EVENTS property.

A handler can have a JSEvent property type which is able to map a Dom event to a JSEvent object that the handler can have in Servoy scripting. A mapping is mostly made automatically by calling using in the template: 

svy-click='handlers.onActionMethodID($event)'

If you need to make one manually you can also do that by using the $utils factory service

$utils.createJSEvent(e,"onselectionchanged")

Anchor
documentingHandlers documentingHandlers

Documenting handlers and handler templates

Handlers can be documented - for use inside the developer - using the following keys (these are used in properties view tooltip or when generating new handler methods):

• doc (used to be description; describes when the handler will be called and what it's for)
• code (when a new method  is created for that handler, this default code template will be inserted)
• for return value details returns can be an object with sub-keys: { type, doc, default (only relevant if "code" was not given) }
• for parameter details parameters: [ { doc, optional (is false by default) } ].

For example:

"onDataChange": {
        "returns":  { "type": "boolean", "doc": "if it returns true then the data change is considered to be valid, otherwise it will be blocked/reverted by the component", "default": true },
        "parameters": [
            { "name": "newValue", "type": "string", "doc": "the new value entered by the user" },
            { "name": "oldValue", "type": "string", "optional": true, "doc": "the previous value if available" } 
        ],
		"doc": "<b>onDataChange</b> will be called if the user modified the field's content and then either tabbed out/clicked outside of the field or hit enter. The handler can decide wether to allow the change or not.",
		"code": "// if we set this we should remove the 'default' from 'returns'\nreturn !!newValue;"
}

For information about documenting properties see Documenting what properties do above,. For information about documenting API functions see the documenting api functions example.

Api

This section defines the signatures and behaviors of functions that can be called from the solution on this component/service.

The signature description json for functions in the api section describes the arguments, type of call and return type, For example:

"someFunctionName": {
        "parameters": [
            { "name": "startIndex", "type": "int" },
            { "name": "endIndex", "type": "int" },
            {
                "name": "theData",
                "type": {
                    "type": "dataset",
                    "includeColumnNames": true,
                    "columnTypes": { "icon": "media" }
                }
            }
        ]
}

The implementation of such api functions can be located either in the browser-side component/service logic implementation ("definition" in .spec file) or in the server-side component/service logic implementation ("serverscript" in .spec file)

There are several types of of sync/async api calls described below.

For information about documenting API functions see the documenting api functions example.

Sync functions

This is the default type of api function; the example above is a sync api function definition. Sync functions will call the client and wait for the api function to execute/return before continuing. Sync api functions can have a return valueof api function; the example above is a sync api function definition. Sync functions will call the client and wait for the api function to execute/return before continuing. Sync api functions can have a return value.

Client side code of the sync api function can return either directly the intended return value or a Promise that in the end resolves with the intended return value. Server will wait for any client returned Promise to resolve before resuming server-side code execution.

In case of component sync functions, if the form is not present in browser's DOM then sync calls will force-load it in a hidden div just in order to execute the sync function on the component.

Sync functions that do not block event processing

...

Just add "async": true (another optional parameter (that by default is false)) to the call definition; it means the client side api is not called right away, but at next message sent to the clientsent to the client.

In case of component async functions, if the form is not present in browser's DOM when the async call is supposed to execute (later) then it will force-load it in a hidden div just in order to execute the async function on the component.

        "executeSomethingLater": 
        {
            "async": true
        }

...

They are useful when for example you want to send progress information to the service client-side while executing a long-running-operation server-side.

Async-now function calls will not send other pending async calls to client nor update the client's state with other pending changes (model updates of components/services/etc.).

Just add "async-now": true (another optional parameter (that by default is false)) to the call definition.

...

Just add "discardPreviouslyQueuedSimilarCalls": true (another optional parameter (that by default is false)) to the call definition. This flag was also known previously as "globalExclusive" (but that is now deprecated).

        "requestFocus": {
            "parameters": [ { "name": "mustExecuteOnFocusGainedMethod", "type": "boolean", "optional": true }],
            "requestFocusdelayUntilFormLoads": {true,
            "parametersdiscardPreviouslyQueuedSimilarCalls": [ { "name": "mustExecuteOnFocusGainedMethod", "type": "boolean", "optional": true }],
            "delayUntilFormLoads": true,
            "discardPreviouslyQueuedSimilarCalls": true
        }

...

true
        }

Allow server side calls when component or parent form is not visible

By default, server side calls coming from client are ignored if the component or the parent form is not visible (anymore). For example, a call to a server side function when switching to a new form, to do some cleanup, might get blocked. To still allow these calls, you should add "allowaccess" : "visible" to the function definition in the .spec file.

Server Side Scripting

A component or service can have a server-side part as well (optional); this logic is executed directly on the server; in the spec file this is configured like:

"serverscript": "servoydefault/tabpanel/tabpanel_server.js",

See Server Side Scripting for more info about server side scripting.

Doc file

(From 2021.12 on)

A component or service can have a server-side part as well (optional); this logic is executed directly on the server; in the spec file this is configured like:doc file for specifying documentation of the api and model properties. This is the same as the JSDoc in client side (.js) file, but is needed because NG2 doesn't have a js file that we can use in this way, requiring doc to be specified in another place.

The api doc/property doc can also be specified in the spec file itself using the doc property , however this is suitable only for small descriptions.  

"serverscriptdoc": "servoydefault/tabpanel/tabpanel_serverdoc.js",

...

/**
 * some sample text
 * @example elements.%%elementName%%.yourName = 'myname'
 */
var yourName;

/**
 * This is a sample function from doc javascript file.
 */
function somemethod() {
}

Palette categories

Web Components are organized in component packages. The palette of the WYSIWYG editor shows components grouped by package name. To further group components from the same package, the property 'categoryName' can be used. 'categoryName' is a property that each component can specify in its spec file. The palette then displays components belonging to the same category grouped under the specified 'categoryName'.

...

{
	"name": "packagename-componentname",
	"displayName": "String more descriptive name that is shown in the designer",
	"categoryName": "Advanced",
...
}

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Example

Anchor
example example

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