Method insertChild

src/tree/model/node.js:147–167

(child, index)

  }

  insertChild(child, index) {
    if (!child) throw new Error('insertChild error: child is required.');

    if (!(child instanceof Node)) {
      Object.assign(child, {
        parent: this,
        store: this.store
      });
      child = new Node(child);
    }

    child.level = this.level + 1;

    if (typeof index === 'undefined' || index < 0) {
      this.childNodes.push(child);
    } else {
      this.childNodes.splice(index, 0, child);
    }

    this.updateLeafState();
  }

  insertBefore(child, ref) {
    let index;