postMessage

Sends a message to this form or to child forms. The receiving form's onMessage handler is invoked.

Parameters

name (string): The message name, which routes to the onMessage handler
data (any): The payload passed to the handler (may be null)
target (string, optional): The delivery target
- null or an empty string → itself
- a FormContainer name → that child form
- comma-separated → several child forms at once
- '*' → broadcast to itself and every embedded form

Returns: None (void)

postMessage vs postMessageAll vs postDelayedMessage vs postMessageToApp

Method	Delivery scope	Delay
`postMessage`	Itself, or the child forms you name	None
`postMessageAll`	Itself plus every child form (recursive)	None
`postDelayedMessage`	Same as `postMessage`	After the given milliseconds
`postMessageToApp`	App level (KAppManager)	0 or the given milliseconds

Example

// 자기 자신에게 메시지
$form.postMessage("refresh", null, null);

// 특정 자식 폼에 전달
$form.postMessage("updateStock", { code: "005930" }, "stockChart");

// 여러 자식에 동시 전달
$form.postMessage("resetAll", null, "panel1,panel2");

// 자신 + 모든 임베드 폼에 브로드캐스트
$form.postMessage("themeChanged", { dark: true }, "*");

Related

$form.postMessageAll(name, data) — sends recursively to itself and all children
$form.postDelayedMessage(name, data, target, milliSeconds) — sends after a delay
$form.postMessageToApp(name, data, milliSeconds) — app-level message

postMessage​

postMessage