js updates

by Willy-JL , oldip

applications/system/js_app/examples/apps/Scripts/badusb_demo.js

@@ -26,6 +26,12 @@ if (badusb.isConnected()) {
     badusb.println("Flipper Name: " + flipper.getName());
     badusb.println("Battery level: " + to_string(flipper.getBatteryCharge()) + "%");
 
+    // Alt+Numpad method works only on Windows!!!
+    badusb.altPrintln("This was printed with Alt+Numpad method!");
+
+    // There's also badusb.print() and badusb.altPrint()
+    // which don't add the return at the end
+
     notify.success();
 } else {
     print("USB not connected");

applications/system/js_app/examples/apps/Scripts/keyboard.js

@@ -4,16 +4,20 @@ keyboard.setHeader("Example Text Input");
 
 // Default text is optional
 let text = keyboard.text(100, "Default text", true);
+// Returns undefined when pressing back
 print("Got text:", text);
 
 keyboard.setHeader("Example Byte Input");
 
 // Default data is optional
-let data = keyboard.byte(6, Uint8Array([1, 2, 3, 4, 5, 6]));
-data = Uint8Array(data);
-let result = "0x";
-for (let i = 0; i < data.byteLength; i++) {
-    if (data[i] < 0x10) result += "0";
-    result += to_hex_string(data[i]);
+let result = keyboard.byte(6, Uint8Array([1, 2, 3, 4, 5, 6]));
+// Returns undefined when pressing back
+if (result !== undefined) {
+    let data = Uint8Array(result);
+    result = "0x";
+    for (let i = 0; i < data.byteLength; i++) {
+        if (data[i] < 0x10) result += "0";
+        result += to_hex_string(data[i]);
+    }
 }
 print("Got data:", result);

applications/system/js_app/examples/apps/Scripts/stringutils.js

@@ -0,0 +1,19 @@
+let sampleText = "Hello, World!";
+
+let lengthOfText = "Length of text: " + to_string(sampleText.length);
+print(lengthOfText);
+
+let start = 7;
+let end = 12;
+let substringResult = sampleText.slice(start, end);
+print(substringResult);
+
+let searchStr = "World";
+let result2 = to_string(sampleText.indexOf(searchStr));
+print(result2);
+
+let upperCaseText = "Text in upper case: " + to_upper_case(sampleText);
+print(upperCaseText);
+
+let lowerCaseText = "Text in lower case: " + to_lower_case(sampleText);
+print(lowerCaseText);

applications/system/js_app/examples/apps/Scripts/submenu.js

@@ -7,5 +7,5 @@ submenu.addItem("Item 3", 2);
 submenu.setHeader("Select an option:");
 
 let result = submenu.show();
-
+// Returns undefined when pressing back
 print("Result:", result);