#npm #printing #dependencies #angular6 #thermal-printer
#npm #печать #зависимости #angular6 #термопринтер
Вопрос:
Я использую ng-thermal-print, но получаю некоторую ошибку. версия зависимостей angualar: 6 ng-thermal-print: 0.1.5
package.json
"@agm/core": "1.0.0-beta.3",
"@angular/animations": "^6.1.7",
"@angular-devkit/build-angular": "~0.7.0",
"@angular/cli": "~6.1.2",
"@angular/compiler-cli": "^6.1.0",
"@angular/language-service": "^6.1.0",
"@angular/common": "^6.1.0",
"@angular/compiler": "^6.1.0",
"@angular/core": "6.1.0",
"@angular/fire": "^5.0.2",
"@angular/forms": "^6.1.0",
app.component.ts
import { Component, OnDestroy } from "@angular/core";
import { ApiService } from "../../services/api.service";
import { PrintService, UsbDriver, WebPrintDriver } from "ng-thermal-print";
@Component({
selector: "app-dashboard",
templateUrl: "./dashboard.component.html",
})
export class DashboardComponent implements OnDestroy {
status: boolean = false;
usbPrintDriver: UsbDriver;
webPrintDriver: WebPrintDriver;
ip: string = "";
public constructor(
public api: ApiService,
private printService: PrintService
) {
this.usbPrintDriver = new UsbDriver();
this.printService.isConnected.subscribe((result) => {
this.status = resu<
if (result) {
console.log("Connected to printer!!!");
} else {
console.log("Not connected to printer.");
}
});
}
requestUsb() {
this.usbPrintDriver.requestUsb().subscribe((result) => {
this.printService.setDriver(this.usbPrintDriver, "ESC/POS");
});
}
connectToWebPrint() {
this.webPrintDriver = new WebPrintDriver(this.ip);
this.printService.setDriver(this.webPrintDriver, "WebPRNT");
}
print(data) {
this.printService
.init()
.setBold(true)
.writeLine("Hello World")
.setBold(false)
.feed(4)
.cut("full")
.flush();
}
ngOnDestroy() {}
}
app.component.html
<button class="btn btn-success">Print Order</button>
Я получаю некоторую ошибку, например, Object (…) не является функцией
Я установил @types /w3c-web-usb для обнаружения usb