igniteui-webcomponents/components/common/controllers/command.js

Ignite UI for Web Components is a complete library of UI components, giving you the ability to build modern web applications using encapsulation and the concept of reusable components in a dependency-free approach.

class CommandController {
    constructor(host) {
        this._commandMap = new Map();
        this._host = host;
        host.addController(this);
    }
    set(command, callback) {
        this._commandMap.set(command, callback);
        return this;
    }
    hostConnected() {
        this._host.addEventListener('command', this);
    }
    hostDisconnected() {
        this._host.removeEventListener('command', this);
    }
    handleEvent(event) {
        const commandEvent = event;
        this._commandMap.get(commandEvent.command)?.call(this._host);
    }
}
export function addCommandController(host) {
    return new CommandController(host);
}
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