How to add a click event

This is my custom block code:

{
                  id: 'link',
                  label: "Link",
                  content:`<mj-wrapper padding="0px">
                      <mj-section border="1px dashed #e0e4e8" background-color="#f9fafb" padding="0px">
                        <mj-column padding-top="0px" vertical-align="middle" width="78%">
                          <mj-text>https://</mj-text>
                        </mj-column>
                        <mj-column padding="0px" vertical-align="middle" width="20%" padding-right="50px">
                          <mj-button padding="0px" width="100%" > Add link</mj-button>
                        </mj-column>
                      </mj-section>
                    </mj-wrapper>`,
                  attributes:{class:'fa fa-link'},
                }

I want to add a click event to the button after adding it to the canvas, and when I click it, I can get the content in the mj-text