🚨 Lint examples with eslint:recommended

Since we're targetting Node 12 (should we go up?), the target ES spec is 2019.

packages/examples/.eslintrc

@@ -0,0 +1,10 @@
+{
+    "extends": [
+        "eslint:recommended"
+    ],
+    "env": {
+        "node": true,
+        "browser": false,
+        "es2019": true
+    }
+}

packages/examples/package.json

@@ -5,8 +5,9 @@
   "description": "",
   "scripts": {
     "js": "node src/javascript.js",
-    "ts": "ts-node src/typescript.ts"
-  },
+    "ts": "ts-node src/typescript.ts",
+    "lint": "eslint -c .eslintrc --ignore-path ../../.eslintignore ./"
+},
   "engines": {
     "node": ">=12"
   },

packages/examples/src/javascript.js

@@ -1,36 +1,36 @@
-var fs = require('fs');
-var path = require('path');
-var plainAddPlaceholder = require('@signpdf/placeholder-plain').plainAddPlaceholder
-var signpdf = require('@signpdf/signpdf').default;
-var P12Signer = require('@signpdf/signer-p12').P12Signer;
-
-function work() {
-    // contributing.pdf is the file that is going to be signed
-    var sourcePath = path.join(__dirname, '/../../../resources/contributing.pdf');
-    var pdfBuffer = fs.readFileSync(sourcePath);
-
-    // certificate.p12 is the certificate that is going to be used to sign
-    var certificatePath = path.join(__dirname, '/../../../resources/certificate.p12');
-    var certificateBuffer = fs.readFileSync(certificatePath);
-    var signer = new P12Signer(certificateBuffer);
-
-    // The PDF needs to have a placeholder for a signature to be signed.
-    var pdfWithPlaceholder = plainAddPlaceholder({
-        pdfBuffer: pdfBuffer,
-        reason: 'The user is decalaring consent through JavaScript.',
-        contactInfo: '[email protected]',
-        name: 'John Doe',
-        location: 'Free Text Str., Free World',
-    });
-
-    // pdfWithPlaceholder is now a modified buffer that is ready to be signed.
-    signpdf
-        .sign(pdfWithPlaceholder, signer)
-        .then(function (signedPdf) {
-            // signedPdf is a Buffer of an electronically signed PDF. Store it.
-            var targetPath = path.join(__dirname, '/../output/javascript.pdf');
-            fs.writeFileSync(targetPath, signedPdf);
-        })
-}
-
+var fs = require('fs');
+var path = require('path');
+var plainAddPlaceholder = require('@signpdf/placeholder-plain').plainAddPlaceholder;
+var signpdf = require('@signpdf/signpdf').default;
+var P12Signer = require('@signpdf/signer-p12').P12Signer;
+
+function work() {
+    // contributing.pdf is the file that is going to be signed
+    var sourcePath = path.join(__dirname, '/../../../resources/contributing.pdf');
+    var pdfBuffer = fs.readFileSync(sourcePath);
+
+    // certificate.p12 is the certificate that is going to be used to sign
+    var certificatePath = path.join(__dirname, '/../../../resources/certificate.p12');
+    var certificateBuffer = fs.readFileSync(certificatePath);
+    var signer = new P12Signer(certificateBuffer);
+
+    // The PDF needs to have a placeholder for a signature to be signed.
+    var pdfWithPlaceholder = plainAddPlaceholder({
+        pdfBuffer: pdfBuffer,
+        reason: 'The user is decalaring consent through JavaScript.',
+        contactInfo: '[email protected]',
+        name: 'John Doe',
+        location: 'Free Text Str., Free World',
+    });
+
+    // pdfWithPlaceholder is now a modified buffer that is ready to be signed.
+    signpdf
+        .sign(pdfWithPlaceholder, signer)
+        .then(function (signedPdf) {
+            // signedPdf is a Buffer of an electronically signed PDF. Store it.
+            var targetPath = path.join(__dirname, '/../output/javascript.pdf');
+            fs.writeFileSync(targetPath, signedPdf);
+        })
+}
+
 work();

packages/examples/src/pdfkit010-with-visual.js

@@ -51,7 +51,7 @@ function work() {
         size: 'A4',
         layout: 'portrait',
         bufferPages: true,
-    });;
+    });
     pdf.info.CreationDate = '';
 
     // At the end we want to convert the PDFKit to a string/Buffer and store it in a file.
@@ -125,6 +125,6 @@ function work() {
     // Finally end the PDFDocument stream.
     pdf.end();
     // This has just triggered the `pdfReady` Promise to be resolved.
-};
+}
 
 work();

packages/examples/src/pdfkit010.js

@@ -12,7 +12,7 @@ function work() {
         size: 'A4',
         layout: 'portrait',
         bufferPages: true,
-    });;
+    });
     pdf.info.CreationDate = '';
 
     // At the end we want to convert the PDFKit to a string/Buffer and store it in a file.
@@ -74,6 +74,6 @@ function work() {
     // Finally end the PDFDocument stream.
     pdf.end();
     // This has just triggered the `pdfReady` Promise to be resolved.
-};
+}
 
 work();

packages/examples/src/webcrypto-external.js

@@ -11,21 +11,22 @@ var createCertificate = require('./utils').createCertificate;
 // WebCrypto signing can also be implemented more easily by subclassing the Signer abstract
 // class directly, as is done in the `webcrypto.js` example script.
 class CryptoSigner extends ExternalSigner {
-    // 'SHA-256', 'SHA-384' or 'SHA-512' are supported by webcrypto
-    supportedHashAlgorithms = ['SHA-256', 'SHA-384', 'SHA-512'];
-
-    // 'RSASSA-PKCS1-v1_5', 'RSA-PSS' or 'ECDSA' are supported by webcrypto
-    supportedSignAlgorithms = ['RSASSA-PKCS1-v1_5', 'RSA-PSS', 'ECDSA'];
 
     constructor(signAlgorithm = 'ECDSA', hashAlgorithm = 'SHA-512') {
         super();
 
+        // 'SHA-256', 'SHA-384' or 'SHA-512' are supported by webcrypto
+        var supportedHashAlgorithms = ['SHA-256', 'SHA-384', 'SHA-512'];
+
+        // 'RSASSA-PKCS1-v1_5', 'RSA-PSS' or 'ECDSA' are supported by webcrypto
+        var supportedSignAlgorithms = ['RSASSA-PKCS1-v1_5', 'RSA-PSS', 'ECDSA'];
+
         // Verify and set signature and hash algorithms
-        if (!this.supportedSignAlgorithms.includes(signAlgorithm)) {
+        if (!supportedSignAlgorithms.includes(signAlgorithm)) {
             throw new Error(`Signature algorithm ${signAlgorithm} is not supported by WebCrypto.`);
         }
         this.signAlgorithm = signAlgorithm;
-        if (!this.supportedHashAlgorithms.includes(hashAlgorithm)) {
+        if (!supportedHashAlgorithms.includes(hashAlgorithm)) {
             throw new Error(`Hash algorithm ${hashAlgorithm} is not supported by WebCrypto.`);
         }
         this.hashAlgorithm = hashAlgorithm;

packages/examples/src/webcrypto.js

@@ -7,21 +7,22 @@ var createCertificate = require('./utils').createCertificate;
 
 // Signer implementation using the WebCrypto API
 class CryptoSigner extends Signer {
-    // 'SHA-256', 'SHA-384' or 'SHA-512' are supported by webcrypto
-    supportedHashAlgorithms = ['SHA-256', 'SHA-384', 'SHA-512'];
-
-    // 'RSASSA-PKCS1-v1_5', 'RSA-PSS' or 'ECDSA' are supported by webcrypto
-    supportedSignAlgorithms = ['RSASSA-PKCS1-v1_5', 'RSA-PSS', 'ECDSA'];
 
     constructor(signAlgorithm = 'RSA-PSS', hashAlgorithm = 'SHA-512') {
         super();
 
+        // 'SHA-256', 'SHA-384' or 'SHA-512' are supported by webcrypto
+        var supportedHashAlgorithms = ['SHA-256', 'SHA-384', 'SHA-512'];
+
+        // 'RSASSA-PKCS1-v1_5', 'RSA-PSS' or 'ECDSA' are supported by webcrypto
+        var supportedSignAlgorithms = ['RSASSA-PKCS1-v1_5', 'RSA-PSS', 'ECDSA'];
+
         // Verify and set signature and hash algorithms
-        if (!this.supportedSignAlgorithms.includes(signAlgorithm)) {
+        if (!supportedSignAlgorithms.includes(signAlgorithm)) {
             throw new Error(`Signature algorithm ${signAlgorithm} is not supported by WebCrypto.`);
         }
         this.signAlgorithm = signAlgorithm;
-        if (!this.supportedHashAlgorithms.includes(hashAlgorithm)) {
+        if (!supportedHashAlgorithms.includes(hashAlgorithm)) {
             throw new Error(`Hash algorithm ${hashAlgorithm} is not supported by WebCrypto.`);
         }
         this.hashAlgorithm = hashAlgorithm;