<p>안녕하세요. 강의해 주셔서 감사합니다. 강의를 듣고 따라하니 재밌네요.&nbsp;</p>
<p>id변경을 watch를 통해 감지해서 다음과 같이 했는데 이렇게 하면 되나요?</p>
<div style="color: #d6deeb; background-color: #011627; font-family: Consolas, 'Courier New', monospace; font-size: 14px; line-height: 19px; white-space: pre;">
<div>&nbsp;&nbsp;&nbsp;&nbsp;watch:&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;user_id&nbsp;:&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #82aaff; font-style: italic;">handler</span>:&nbsp;<span style="color: #c792ea;">function</span>&nbsp;<span style="color: #d9f5dd;">(</span><span style="color: #d7dbe0;">val</span>,&nbsp;<span style="color: #d7dbe0;">oldVal</span><span style="color: #d9f5dd;">)</span>&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #7fdbca; font-style: italic;">console</span><span style="color: #c792ea; font-style: italic;">.</span><span style="color: #82aaff; font-style: italic;">log</span>(<span style="color: #d9f5dd;">'</span><span style="color: #ecc48d;">user_id&nbsp;changed</span><span style="color: #d9f5dd;">'</span>)</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #7fdbca;">this</span><span style="color: #c792ea; font-style: italic;">.</span><span style="color: #baebe2;">check_user_id</span>&nbsp;<span style="color: #c792ea;">=</span>&nbsp;<span style="color: #ff5874;">false</span></div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;},</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}</div>
<div>&nbsp;&nbsp;&nbsp;}</div>
</div>

Inflearn Community Q&A

회원가입폼에서 중복확인 후 id를 변경시 중복확인을 다시하도록 처리.