ia-label="Permalink to &quot;index&quot;">​</a></h3><p>当前执行动作的指针</p><ul><li><strong>类型</strong></li></ul><div class="language-ts vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-dark github-light vp-code"><code><span class="line"><span style="--shiki-dark:#E1E4E8;--shiki-light:#24292E;">number;</span></span></code></pre></div><h3 id="step" tabindex="-1">step <a class="header-anchor" href="#step" aria-