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1. Prerequisites

To follow this guide, you will need to:

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2. Install and initialize the CodeQR TypeScript SDK

1

Install

Install the CodeQR TypeScript SDK using your preferred package manager:
npm install codeqr
2

Initialize

Then, initialize the CodeQR TypeScript SDK with your API key.
lib/codeqr.ts
import { CodeQR } from "codeqr";

export const codeqr = new CodeQR({
  token: process.env.CODEQR_API_KEY, // optional, defaults to CODEQR_API_KEY env variable
});
You can now use the codeqr object to interact with the CodeQR API.
import { codeqr } from "./lib/codeqr";
Let’s create a short link using the CodeQR TypeScript SDK.
index.ts
app.post("/create-link", async (req: Request, res: Response) => {
  try {
    const result = await codeqr.links.create({
      url: "https://www.google.com",
    });

    res.status(200).json(result);
  } catch (error: any) {
    res.status(400).json(error);
  }
});
Optionally, you can also pass an externalId field which is a unique identifier for the link in your own database to associate it with the link in CodeQR’s system.
index.ts
app.post("/create-link", async (req: Request, res: Response) => {
  try {
    const result = await codeqr.links.create({
      url: "https://www.google.com",
      externalId: "12345",
    });

    res.status(200).json(result);
  } catch (error: any) {
    res.status(400).json(error);
  }
});
This will let you easily update the link or retrieve analytics for it later on using the externalId instead of the CodeQR linkId. CodeQR TypeScript SDK provides a method to upsert a link – where an existing link is updated if it exists, or a new link is created if it doesn’t. so you don’t have to worry about checking if the link already exists.
index.ts
app.post("/upsert-link", async (req: Request, res: Response) => {
  try {
    // Update the link if same URL already exists or create a new link
    const result = await codeqr.links.upsert({
      url: "https://www.google.com",
    });

    res.status(200).json(result);
  } catch (error: any) {
    res.status(400).json(error);
  }
});
This way, you won’t have to worry about checking if the link already exists when you’re creating it. Let’s update an existing link using the CodeQR TypeScript SDK. You can do that in two ways:
  • Using the link’s linkId in CodeQR’s system.
  • Using the link’s externalId in your own database (prefixed with ext_).
index.ts
app.post("/update-link", async (req: Request, res: Response) => {
  try {
    // Update a link by its linkId
    const { shortLink } = await codeqr.links.update(
      "link_rWOKByP0bRMrstK8e4HPjprJ",
      {
        url: "https://www.google.uk", // new URL
      }
    );

    // Update a link by its externalId
    const { shortLink } = await codeqr.links.update("ext_12345", {
      url: "https://www.google.uk", // new URL
    });

    res.status(200).json({ shortLink });
  } catch (error: any) {
    res.status(400).json(error);
  }
});
CodeQR allows you to retrieve analytics for a link using the CodeQR TypeScript SDK.
index.ts
import { ClicksTimeseries } from "codeqr/models/components";

app.get("/analytics", async (req: Request, res: Response) => {
  try {
    // Retrieve the timeseries analytics for the last 7 days for a link
    const response = await codeqr.analytics.retrieve({
      linkId: "clv3o9p9q000au1h0mc7r6l63",
      interval: "7d",
      groupBy: "timeseries",
    });

    const timeseries = response as ClicksTimeseries[];

    res.status(200).json(timeseries);
  } catch (error: any) {
    res.status(400).json(error);
  }
});
Similarly, you can retrieve analytics for a link using the externalId field.
index.ts
// Retrieve the timeseries analytics for the last 7 days for a link
const response = await codeqr.analytics.retrieve({
  externalId: "ext_12345",
  interval: "7d",
  groupBy: "timeseries",
});

const timeseries = response as ClicksTimeseries[];

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7. Examples

Express Example

See the full example on GitHub.