Issue with the loss of scope in the Subscribe event causing the Clipboard Copy Event

Hey there, currently I am attempting to implement a text copying feature in Angular 2. I have a function that executes when a button is pressed, fetching data from the database and converting it into readable text, which is then automatically copied to the clipboard.

 

Everything works smoothly when the copying process is outside the subscribe event. However, when placed inside the subscribe event, nothing is copied to the clipboard.

It turns out that once the event is unsubscribed, the window loses its scope and the clipboard is left empty. I conducted a test in debug mode using var clipboardContent = window.getSelection().toString(); and found out that the content is set correctly within the subscribe event, but disappears as soon as the event concludes.

 

function getAllUserDetail() {

 

   const selBox = document.createElement('textarea');

  this._service.getUserDetails(this.model)

  .subscribe(jentries => {

    const entryText = jentries;

    selBox.style.position = 'fixed';

    selBox.style.left = '0';

    selBox.style.top = '0';

    selBox.style.opacity = '0';

    selBox.value = sqlString;

 

    document.body.appendChild(selBox);

    selBox.focus();

    selBox.select();

 

    document.execCommand('copy');

    document.body.removeChild(selBox);

}

Although this approach somewhat functions, it does not meet my requirements.

 

    

function getAllUserDetail() {

 

        const entryText = 'TEST DATA';

        selBox.style.position = 'fixed';

        selBox.style.left = '0';

        selBox.style.top = '0';

        selBox.style.opacity = '0';

        selBox.value = sqlString;

 

        document.body.appendChild(selBox);

        selBox.focus();

        selBox.select();

 

        document.execCommand('copy');

        document.body.removeChild(selBox);

 

 

    this._service.getUserDetails(this.model)

      .subscribe(jentries => { });

}

Answer №1

Utilize a different approach by invoking another function outside of the subscription and passing the sqlString as an argument.

retrieveAllUserData() {
  this._service.getUserDetails(this.model).subscribe(data => {
      this.processData(data);
   });
}

processData(sqlString: string) {

    const tempElement = document.createElement('textarea');

    tempElement.style.position = 'fixed';

    tempElement.style.left = '0';

    tempElement.style.top = '0';

    tempElement.style.opacity = '0';

    tempElement.value = sqlString;

    document.body.appendChild(tempElement);

    tempElement.focus();

    tempElement.select();

    document.execCommand('copy');

    document.body.removeChild(tempElement);

}

Answer №2

After realizing I needed to trigger my subscribe event from another function, I decided to store the entries in a class variable.

When the user clicked the button, I was able to easily copy the text to the clipboard using the class variable I had already assigned.

Although it wasn't exactly what I had in mind, it did the trick and got the job done efficiently.

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