import { ElasticLoadBalancingV2Client, AddListenerCertificatesCommand } from "@aws-sdk/client-elastic-load-balancing-v2"; // ES Modules import
// const { ElasticLoadBalancingV2Client, AddListenerCertificatesCommand } = require("@aws-sdk/client-elastic-load-balancing-v2"); // CommonJS import
const client = new ElasticLoadBalancingV2Client(config);
const command = new AddListenerCertificatesCommand(input);
const response = await client.send(command);

import * as AWS from "@aws-sdk/client-elastic-load-balancing-v2";
const client = new AWS.ElasticLoadBalancingV2({ region: "REGION" });

// async/await.
try {
  const data = await client.addListenerCertificates(params);
  // process data.
} catch (error) {
  // error handling.
}

// Promises.
client
  .addListenerCertificates(params)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  });

// callbacks.
client.addListenerCertificates(params, (err, data) => {
  // proccess err and data.
});