"token comment" style="color:#999988;font-style:italic">// 调用 callback 更新视图</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">    </span><span class="token keyword" style="color:#00009f">this</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">cb</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d7