How do we import Blockly into an Angular 7 application?

Question

I\'m trying to use Blockly in an Angular 7 application but I\'m unable to inject the Blockly editor.

I have downloaded the files from https://developers.google.com/b

Answer 1

I was able to setup with the config mentioned below -

install blockly with npm -

npm install git://github.com/google/blockly.git#1.20190419.0

included below files in scripts section of angular.json file -

    "scripts": [
      "node_modules/blockly/blockly_compressed.js",
      "node_modules/blockly/blocks_compressed.js",
      "node_modules/blockly/msg/js/en.js",
      "src/assets/blockly/custom_blocks.js"
    ]

added below lines in my component html file -

angular will throw error at this point saying it does not recognise the blockly tags. So need to use NO_ERRORS_SCHEMA in the module or can represent the toolbar XML as a string in the component TS file and use it to inject blockly.

my component TS file -

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
import { ProgramService } from '../services/program.service';
import { IProgram } from '../models/program';

declare var Blockly: any;

@Component({
  selector: 'app-program-create',
  templateUrl: './program-create.component.html',
  styleUrls: ['./program-create.component.scss']
})
export class ProgramCreateComponent implements OnInit {
  title: string;
  programName: string;
  program: IProgram;
  workspace: any;

  constructor(
    private route: ActivatedRoute,
    private programService: ProgramService,
    private router: Router
  ) {
    this.title = 'Create Visual Program';
    this.route.params.subscribe(params => {
      this.programName = params['programName'];
      this.program = this.programService.getOne(this.programName);
      if (!this.program) {
        this.program = {
          name: this.programName,
          xmlData: null
        };
      }
      console.log(
        'creating/editing the program - ',
        JSON.stringify(this.program)
      );
    });
  }

  ngOnInit() {
    this.workspace = Blockly.inject('blocklyDiv', {
      toolbox: document.getElementById('toolbox'),
      scrollbars: false
    });

    if (this.program.xmlData) {
      this.workspace.clear();
      Blockly.Xml.domToWorkspace(
        Blockly.Xml.textToDom(this.program.xmlData),
        this.workspace
      );
    }
  }

  saveProgram(): void {
    this.program.xmlData = Blockly.Xml.domToText(
      Blockly.Xml.workspaceToDom(this.workspace)
    );
    console.log('saving the program - ', JSON.stringify(this.program));
    this.programService.upsertOne(this.program);
    this.router.navigate(['listProgram']);
  }
}

I have written an article explaining this in details here - Integrate Google Blockly with Angular