add js extensions use window atob

package.json

@@ -29,7 +29,6 @@
     "url": "https://github.com/espressif/esptool-js/issues"
   },
   "dependencies": {
-    "buffer": "^6.0.3",
     "pako": "^2.1.0",
     "tslib": "^2.4.1"
   },

src/esploader.ts

@@ -1,9 +1,8 @@
-import { ESPError } from "./error";
+import { ESPError } from "./error.js";
 import { Data, deflate, Inflate } from "pako";
-import { Transport, SerialOptions } from "./webserial";
-import { ROM } from "./targets/rom";
-import { customReset, usbJTAGSerialReset } from "./reset";
-import { Buffer } from "buffer/index";
+import { Transport, SerialOptions } from "./webserial.js";
+import { ROM } from "./targets/rom.js";
+import { customReset, usbJTAGSerialReset } from "./reset.js";
 
 /* global SerialPort */
 
@@ -120,39 +119,39 @@ type FlashReadCallback = ((packet: Uint8Array, progress: number, totalSize: numb
 async function magic2Chip(magic: number): Promise<ROM | null> {
   switch (magic) {
     case 0x00f01d83: {
-      const { ESP32ROM } = await import("./targets/esp32");
+      const { ESP32ROM } = await import("./targets/esp32.js");
       return new ESP32ROM();
     }
     case 0x6f51306f:
     case 0x7c41a06f: {
-      const { ESP32C2ROM } = await import("./targets/esp32c2");
+      const { ESP32C2ROM } = await import("./targets/esp32c2.js");
       return new ESP32C2ROM();
     }
     case 0x6921506f:
     case 0x1b31506f:
     case 0x4881606f:
     case 0x4361606f: {
-      const { ESP32C3ROM } = await import("./targets/esp32c3");
+      const { ESP32C3ROM } = await import("./targets/esp32c3.js");
       return new ESP32C3ROM();
     }
     case 0x2ce0806f: {
-      const { ESP32C6ROM } = await import("./targets/esp32c6");
+      const { ESP32C6ROM } = await import("./targets/esp32c6.js");
       return new ESP32C6ROM();
     }
     case 0xd7b73e80: {
-      const { ESP32H2ROM } = await import("./targets/esp32h2");
+      const { ESP32H2ROM } = await import("./targets/esp32h2.js");
       return new ESP32H2ROM();
     }
     case 0x09: {
-      const { ESP32S3ROM } = await import("./targets/esp32s3");
+      const { ESP32S3ROM } = await import("./targets/esp32s3.js");
       return new ESP32S3ROM();
     }
     case 0x000007c6: {
-      const { ESP32S2ROM } = await import("./targets/esp32s2");
+      const { ESP32S2ROM } = await import("./targets/esp32s2.js");
       return new ESP32S2ROM();
     }
     case 0xfff0c101: {
-      const { ESP8266ROM } = await import("./targets/esp8266");
+      const { ESP8266ROM } = await import("./targets/esp8266.js");
       return new ESP8266ROM();
     }
     default:
@@ -1135,19 +1134,27 @@ export class ESPLoader {
     return resp;
   }
 
+  decodeBase64(romText: string) {
+    if (typeof window !== "undefined" && typeof window.atob === "function") {
+      return window.atob(romText);
+    } else {
+      return Buffer.from(romText, "base64").toString("binary");
+    }
+  }
+
   /**
    * Upload the flasher ROM bootloader (flasher stub) to the chip.
    * @returns {ROM} The Chip ROM
    */
-  async runStub() {
+  async runStub(): Promise<ROM> {
     this.info("Uploading stub...");
-    let decoded = Buffer.from(this.chip.ROM_TEXT, "base64").toString("binary");
+    let decoded = this.decodeBase64(this.chip.ROM_TEXT);
     let chardata = decoded.split("").map(function (x) {
       return x.charCodeAt(0);
     });
     const text = new Uint8Array(chardata);
 
-    decoded = Buffer.from(this.chip.ROM_DATA, "base64").toString("binary");
+    decoded = this.decodeBase64(this.chip.ROM_DATA);
     chardata = decoded.split("").map(function (x) {
       return x.charCodeAt(0);
     });
@@ -1221,7 +1228,7 @@ export class ESPLoader {
   /**
    * Execute the main function of ESPLoader.
    * @param {string} mode Reset mode to use
-   * @returns {ROM} chip ROM
+   * @returns {string} chip ROM
    */
   async main(mode = "default_reset") {
     await this.detectChip(mode);

src/index.ts

@@ -1,4 +1,10 @@
-export { IEspLoaderTerminal, ESPLoader, FlashOptions, LoaderOptions } from "./esploader";
-export { classicReset, customReset, hardReset, usbJTAGSerialReset, validateCustomResetStringSequence } from "./reset";
-export { ROM } from "./targets/rom";
-export { Transport, SerialOptions } from "./webserial";
+export { IEspLoaderTerminal, ESPLoader, FlashOptions, LoaderOptions } from "./esploader.js";
+export {
+  classicReset,
+  customReset,
+  hardReset,
+  usbJTAGSerialReset,
+  validateCustomResetStringSequence,
+} from "./reset.js";
+export { ROM } from "./targets/rom.js";
+export { Transport, SerialOptions } from "./webserial.js";

src/reset.ts

@@ -1,4 +1,4 @@
-import { Transport } from "./webserial";
+import { Transport } from "./webserial.js";
 
 const DEFAULT_RESET_DELAY = 50;
 

src/targets/esp32.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32_STUB from "./stub_flasher/stub_flasher_32.json";
 
 export class ESP32ROM extends ROM {

src/targets/esp32c2.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ESP32C3ROM } from "./esp32c3";
+import { ESPLoader } from "../esploader.js";
+import { ESP32C3ROM } from "./esp32c3.js";
 import ESP32C2_STUB from "./stub_flasher/stub_flasher_32c2.json";
 
 export class ESP32C2ROM extends ESP32C3ROM {
@@ -68,7 +68,7 @@
     return desc;
   }
 
   public async getChipFeatures(loader: ESPLoader) {
     return ["Wi-Fi", "BLE"];
   }
 

src/targets/esp32c3.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32C3_STUB from "./stub_flasher/stub_flasher_32c3.json";
 
 export class ESP32C3ROM extends ROM {
@@ -67,11 +67,11 @@
     return desc;
   }
 
   public async getChipFeatures(loader: ESPLoader) {
     return ["Wi-Fi"];
   }
 
   public async getCrystalFreq(loader: ESPLoader) {
     return 40;
   }
 

src/targets/esp32c6.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32C6_STUB from "./stub_flasher/stub_flasher_32c6.json";
 
 export class ESP32C6ROM extends ROM {
@@ -67,11 +67,11 @@
     return desc;
   }
 
   public async getChipFeatures(loader: ESPLoader) {
     return ["Wi-Fi"];
   }
 
   public async getCrystalFreq(loader: ESPLoader) {
     return 40;
   }
 

src/targets/esp32h2.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32H2_STUB from "./stub_flasher/stub_flasher_32h2.json";
 
 export class ESP32H2ROM extends ROM {

src/targets/esp32s2.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32S2_STUB from "./stub_flasher/stub_flasher_32s2.json";
 
 export class ESP32S2ROM extends ROM {

src/targets/esp32s3.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP32S3_STUB from "./stub_flasher/stub_flasher_32s3.json";
 
 export class ESP32S3ROM extends ROM {

src/targets/esp8266.ts

@@ -1,5 +1,5 @@
-import { ESPLoader } from "../esploader";
-import { ROM } from "./rom";
+import { ESPLoader } from "../esploader.js";
+import { ROM } from "./rom.js";
 import ESP8266_STUB from "./stub_flasher/stub_flasher_8266.json";
 
 export class ESP8266ROM extends ROM {

src/targets/rom.ts

@@ -1,4 +1,4 @@
-import { ESPLoader } from "../esploader";
+import { ESPLoader } from "../esploader.js";
 
 /**
  * Represents a chip ROM with basic registers field and abstract functions.