Retrieve the value of a local variable in the ngOnInit function from a different function

Recently, I've started working with Angular and TypeScript. I am facing an issue where I need to access a local variable that is declared in the ngOnInit function from outside it, but I'm not quite sure how to achieve this correctly. This variable is defined in a component called BlocklyComponent.

export class BlocklyComponent implements OnInit {
      primaryWorkspace: Blockly.WorkspaceSvg;
      
      constructor(private sanitizer: DomSanitizer) {
        this.updateXML = this.updateXML.bind(this);
      }
      
      ngOnInit() {
        var primaryWorkspace = Blockly.inject('primaryDiv',{....} as Blockly.BlocklyOptions);

While I can see the object inside the ngOnInit function without any issues, the problem arises when I try to access the local variable from a new function outside of ngOnInit, specifically when adding a changeListener.


        primaryWorkspace.addChangeListener(this.updateXML); //addChangeListener is specific to the Blockly library
      }
      
      updateXML(primaryEvent) {
        if (primaryEvent.isUiEvent) {
          return; //Do not clone UI events 
        };
        
        var xml = Blockly.Xml.workspaceToDom(primaryWorkspace); //Converting workspace into XML using Blockly library
        console.log(xml);
      } 

I have attempted to use 'this.primaryWorkspace' in the method call, however, it refers to the property rather than the local variable. Although creating the function inside ngOnInit solves the issue, I require updateXML to be declared outside.

Any help on resolving this matter would be greatly appreciated. Thank you.

Answer №1

After some troubleshooting, I realized it was a straightforward issue. To fix it, I reassigned the variable as this.primaryWorkspace instead of using VAR.

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