Added NodeJS samples

nodejs/01-detect-text-local.js

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+/*Example showing processing a document on local machine.*/ 
+
+const aws = require('aws-sdk');
+/*Initializing Textract from AWS SDK JS*/
+const textract = new aws.Textract({ apiVersion: "2018-06-27" });
+/*File system package for importing images and converting the image data to ByteArray */
+const fs = require('fs');
+
+exports.handler = async(event, context) => {
+    let textractParams = {
+        Document: {
+            Bytes: fs.readFileSync("simple-document-image.jpg")
+        },
+    };
+    try {
+        let response = await textract.detectDocumentText(params).promise();
+        console.log(JSON.stringify(response),null,2)
+    }catch(e){
+        console.log("Error: ",e)
+    }
+}

nodejs/02-detect-text-s3.js

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+/*Example showing processing a document on AWS S3 bucket.*/ 
+
+const aws = require('aws-sdk');
+/*Initializing Textract from AWS SDK JS*/
+const textract = new aws.Textract({ apiVersion: "2018-06-27" });
+const s3BucketName = "ki-textract-demo-docs"
+const documentName = "simple-document-image.jpg"
+
+exports.handler = async (event, context) => {
+    let textractParams = {
+        Document: {
+            S3Object: {
+                Bucket: s3BucketName,
+                Name: documentName,
+            }
+        },
+    };
+    try {
+        let response = await textract.detectDocumentText(params).promise();
+        console.log(JSON.stringify(response),null,2)
+    } catch (e) {
+        console.log("Error: ", e)
+    }
+}

nodejs/03-analyze-expense-local.js

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+/*Example showing analyzing expense with document on local machine.*/ 
+
+const aws = require('aws-sdk');
+/*Initializing Textract from AWS SDK JS*/
+const textract = new aws.Textract({ apiVersion: "2018-06-27" });
+/*File system package for importing images and converting the image data to ByteArray */
+const fs = require('fs');
+
+exports.handler = async(event, context) => {
+    let textractParams = {
+        Document: {
+            Bytes: fs.readFileSync("receipt.jfif")
+        },
+    };
+    try {
+        let response = await textract.analyzeExpense(params).promise();
+        console.log(JSON.stringify(response),null,2)
+    }catch(e){
+        console.log("Error: ",e)
+    }
+}

nodejs/04-analyze-expense-s3.js

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+/*Example showing analyzing expense with document on AWS S3 bucket.*/ 
+
+const aws = require('aws-sdk');
+/*Initializing Textract from AWS SDK JS*/
+const textract = new aws.Textract({ apiVersion: "2018-06-27" });
+const s3BucketName = "ki-textract-demo-docs"
+const documentName = "receipt.jfif"
+
+exports.handler = async (event, context) => {
+    let textractParams = {
+        Document: {
+            S3Object: {
+                Bucket: s3BucketName,
+                Name: documentName,
+            }
+        },
+    };
+    try {
+        let response = await textract.analyzeExpense(params).promise();
+        console.log(JSON.stringify(response),null,2)
+    } catch (e) {
+        console.log("Error: ", e)
+    }
+}

nodejs/README.md

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+# Textract NodeJS Examples
+
+| Argument                                                    | Description                                                |
+| ----------------------------------------------------------- | ---------------------------------------------------------- |
+| [01-detect-text-local.js](./01-detect-text-local.js) | Example showing processing a document on local machine.    |
+| [02-detect-text-s3.js](./02-detect-text-s3.js)      | Example showing processing a document in Amazon S3 bucket. |