Zoeken op website

javascript - Hoe gebruik je/neem je fabricjs op in Angular2

Ik wil fabricjs in mijn project gebruiken. Ik heb fabricjs geïnstalleerd met bower en gekoppeld in index.html, maar het werkt niet. Bekijk alstublieft de onderstaande code.

index.html

<html>

<head>
 <script>document.write('<base href="' + document.location + '" />');         </script>
  <title>Image Editor</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="css/bootstrap/dist/css/bootstrap.min.css">

  <!-- 1. Load libraries -->
  <!-- Polyfill(s) for older browsers -->
  <script src="libs/core-js/client/shim.min.js"></script>
  <script src="libs/zone.js/dist/zone.js"></script>
  <script src="libs/reflect-metadata/Reflect.js"></script>
  <script src="libs/systemjs/dist/system.src.js"></script>

  <script src="css/jquery/dist/jquery.min.js"></script>
  <script src="css/bootstrap/dist/js/bootstrap.min.js"></script>
  // incuding fabricjs here
  <script src="../../bower_components/fabric.js/dist/fabric.min.js"></script>

  <!-- 2. Configure SystemJS -->
  <script src="systemjs.config.js"></script>
  <script>
  System.import('app').catch(function(err){ console.error(err); });
    </script>
</head>

<!-- 3. Display the application -->

<body>
     <my-app>Loading...</my-app>
</body>
</html>

Dit is componentbestand "stage.component.ts"

import {Component, OnInit} from '@angular/core';
import { ActivatedRoute, Router} from '@angular/router';
import { fabric } from 'fabric';
import { ImageService } from '../services/image.service';

declare var fabric:any;
 @Component({
   selector:'my-stage',
   styleUrls: ['./app/stage/stage.component.css'],
   templateUrl: './app/stage/stage.component.html',
 })

 export class StageComponent implements OnInit {
    title:string = 'Image Editor';
    imgpath: string = '';
     canvas:any = null;

   // fabric:any = null;
    constructor(
       private route: ActivatedRoute,
    ) {
    //  this.fabric = new fabric();
    }

  ngOnInit() {

     this.canvas = new fabric.Canvas('fstage', {
        isDrawingMode: true,
        selection: true
      });
  }
}

Ik heb veel referenties gezocht maar kon niet uitvinden wat er mis is met mij. Alstublieft advies, dank u.

Antwoord #1

Modern gebruik:

  1. Installeer Fabric: npm i fabric
  2. Installeer types: npm i @types/fabric

Demo met Angular 5.2.8 en Fabric 2.2.2

HTML

<div>
  <canvas id="myCanvas" width="500" height="500"></canvas>
</div>

TypeScript

import { Component, OnInit } from '@angular/core';
import { fabric } from 'fabric';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit  {
  canvas: any;

  ngOnInit() {
    this.canvas = new fabric.Canvas('myCanvas');
    this.canvas.add(new fabric.IText('Hello Fabric!'));
  }
}

Antwoord #2

Ik kan fabric.js gebruiken zonder de lijn

import { fabric } from 'fabric';

het script laden in index.html en de bibliotheek declareren in het ts-bestand:

import { Component } from '@angular/core';
declare var fabric: any;

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  printValue() {
    console.log(fabric.version);
  };
}

In de browserconsole:

1.6.7  app.component.ts:13

Gerelateerde artikelen