Method add_node

src/jsmind.js:461–483

* Add a new node to the mind map. * @param {string | import('./jsmind.node.js').Node} parent_node * @param {string} node_id * @param {string} topic * @param {Record =} data * @param {('left'|'center'|'right'|'-1'|'0'|'1'|number)=} direction - Direction for node p

(parent_node, node_id, topic, data, direction)

     * @returns {import('./jsmind.node.js').Node|null}
     */
    add_node(parent_node, node_id, topic, data, direction) {
        if (!this.get_editable()) {
            logger.error('fail, this mind map is not editable');
            return null;
        }

        var the_parent_node = this.get_node(parent_node);
        if (!the_parent_node) {
            logger.error('parent node not found');
            return null;
        }

        var node = this._add_node_data(the_parent_node, node_id, topic, data, direction);
        if (!!node) {
            this._refresh_node_ui(the_parent_node);
            this.invoke_event_handle(EventType.edit, {
                evt: 'add_node',
                data: [the_parent_node.id, node_id, topic, data, Direction.of(direction)],
                node: node_id,
            });
        }
        return node;
    }

    /**
     * Add multiple nodes to the mind map with optimized performance.