Prerequisite Please see here to get and set your API Key environment variable.

Install the Lytix NPM package

npm i @lytix/client

​
Trace Capturing

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Error Class

You can now just replace all your throw new Error calls with throw new LError. For example:

...
app.get("/test", async (req, res) => {
  const logger = new LLogger('testRoute');
  /**
   * Lets pretend an error happend
   */
  try {
    logger.info("Some process is starting");
    throw new LError("An unexpeted error", { env: "prod" });
  } catch (err) {
    logger.error("crazy unexpeted error with this user: 123", err);
    res.sendStatus(500);
    return;
  }

  /**
   * Magically if we ended here, we'd reply with a 200
   */
  res.send("Hello World");
});
...

The error, along with the last 20 log lines will automatically get pushed to the lytix platform here

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Error Increment

You can also send an error along with related logs without throwing an error by using the increment method.

import { LErrorIncrement, LLogger } from "@lytix/client";

/**
 * An example background process
 */
const backgroundProcess = async () => {
  const logger = new LLogger("backgroundProcessExample", { userId: "123" });
  try {
    logger.info("Background process started for user!");
    throw new Error("Unexpected error!");
  } catch (err) {
    /**
     * Just increment to get the logs as well as the error
     */
    logger.error(`Unexpected error happened`, err);
    LErrorIncrement("Unexpected error");
  }
};

​
Examples

To see all examples please check the Github repo here