Changed calls of the non-standard method String.substr() to substring().

typescript-javascript/qrcodegen-output-demo.ts

@@ -227,7 +227,7 @@ namespace app {
 			if (str.charAt(i) != "%")
 				result.push(str.charCodeAt(i));
 			else {
-				result.push(parseInt(str.substr(i + 1, 2), 16));
+				result.push(parseInt(str.substring(i + 1, i + 3), 16));
 				i += 2;
 			}
 		}

typescript-javascript/qrcodegen.ts

@@ -761,7 +761,7 @@ namespace qrcodegen {
 			let bb: Array<bit> = []
 			for (let i = 0; i < digits.length; ) {  // Consume up to 3 digits per iteration
 				const n: int = Math.min(digits.length - i, 3);
-				appendBits(parseInt(digits.substr(i, n), 10), n * 3 + 1, bb);
+				appendBits(parseInt(digits.substring(i, i + n), 10), n * 3 + 1, bb);
 				i += n;
 			}
 			return new QrSegment(QrSegment.Mode.NUMERIC, digits.length, bb);
@@ -890,7 +890,7 @@ namespace qrcodegen {
 				if (str.charAt(i) != "%")
 					result.push(str.charCodeAt(i));
 				else {
-					result.push(parseInt(str.substr(i + 1, 2), 16));
+					result.push(parseInt(str.substring(i + 1, i + 3), 16));
 					i += 2;
 				}
 			}