Interface type check with Typescript

Question

This question is the direct analogon to Class type check with TypeScript

I need to find out at runtime if a variable of type any implements an interface. Here\'s my

Answer 1

export interface ConfSteps {
    group: string;
    key: string;
    steps: string[];
}

private verify(): void {
    const obj = `{
      "group": "group",
      "key": "key",
      "steps": [],
      "stepsPlus": []
    } `;
    if (this.implementsObject(obj, ['group', 'key', 'steps'])) {
      console.log(`Implements ConfSteps: ${obj}`);
    }
  }

private objProperties: Array = [];

private implementsObject(obj: any, keys: (keyof T)[]): boolean {
    JSON.parse(JSON.stringify(obj), (key, value) => {
      this.objProperties.push(key);
    });
    for (const key of keys) {
      if (!this.objProperties.includes(key.toString())) {
        return false;
      }
    }
    this.objProperties = null;
    return true;
  }