Can you use aws-sdk util-dynamodb unmarshall in Reactjs

Question

I have a Dynamodb post request resource that an API Gateway resource calls to query a table. I'm attempting to use Axios within my React app to call the API. The API is functioning and returning the desired data (console log), but when I attempt to use @aws-sdk/util-dynamodb (unmarshall) to convert the API data, I encounter issues. converting the item response into JSON for usage in React.

./node_modules/@aws-sdk/util-dynamodb/dist-es/convertToNative.js 45:14 Module parse failed: Unexpected token (45:14)

Is there a way to use 'unmarshall' within React? Something like this:

    useEffect(() => {
    const getGoal = async () => {
        try {
            const response = await api.get(apiUrl)
            setGoal(unmarshall(response.data.Items))

This works if I use a Lambda service, but I'm try to see if I can reduce my code.

Answer 1

Yes, you can use the unmarshall method from the AWS SDK for JavaScript in ReactJS. The AWS SDK for JavaScript provides a set of libraries that allow you to interact with AWS services from JavaScript code, including ReactJS. The unmarshall method is part of the AWS.DynamoDB.Converter module, which provides utility methods for converting between JavaScript data types and DynamoDB data types.

To use the unmarshall method in ReactJS, you will first need to install the AWS SDK for JavaScript by running the following command:

npm install aws-sdk

Next, you will need to import the AWS.DynamoDB.Converter module and the unmarshall method into your ReactJS code. You can do this by adding the following line at the top of your file:

import { DynamoDB } from 'aws-sdk';

Then, you can use the unmarshall method to convert a DynamoDB item into a JavaScript object by calling the method and passing in the DynamoDB item as an argument, like this:

const item = { "id": { "N": "123" }, "name": { "S": "John Smith" }, "age": { "N": "35" }, "location": { "S": "New York" } }; const obj = DynamoDB.Converter.unmarshall(item); console.log(obj); // Output: { id: 123, name: 'John Smith', age: 35, location: 'New York' }

You can then use the resulting JavaScript object in your ReactJS code as needed.

For more information, you can refer to our React JS Certification today.