<h4>New features</h4>

<p>Support optional chaining and nullish coalescing.</p>

<p>Support <code>import.meta</code>.</p>

<p>Add support for <code>export * as ns from "source"</code>.</p>

<h3>7.1.1 (2020-02-13)</h3>

<h4>Bug fixes</h4>

<p>Clean up the type definitions to actually work well with the main parser.</p>

<h3>7.1.0 (2020-02-11)</h3>

<h4>New features</h4>

<p>Add a TypeScript definition file for the library.</p>

<h3>7.0.0 (2017-08-12)</h3>

<h4>New features</h4>

<p>Support walking <code>ImportExpression</code> nodes.</p>

<h3>6.2.0 (2017-07-04)</h3>

<h4>New features</h4>

<p>Add support for <code>Import</code> nodes.</p>

<h3>6.1.0 (2018-09-28)</h3>

<h4>New features</h4>

<p>The walker now walks <code>TemplateElement</code> nodes.</p>

<h3>6.0.1 (2018-09-14)</h3>

<h4>Bug fixes</h4>

<p>Fix bad "main" field in package.json.</p>

<h3>6.0.0 (2018-09-14)</h3>

<h4>Breaking changes</h4>

<p>This is now a separate package, <code>acorn-walk</code>, rather than part of the main <code>acorn</code> package.</p>

<p>The <code>ScopeBody</code> and <code>ScopeExpression</code> meta-node-types are no longer supported.</p>

<h3>5.7.1 (2018-06-15)</h3>

<h4>Bug fixes</h4>

<p>Make sure the walker and bin files are rebuilt on release (the previous release didn't get the up-to-date versions).</p>

<h3>5.7.0 (2018-06-15)</h3>

<h4>Bug fixes</h4>

<p>Fix crash in walker when walking a binding-less catch node.</p>

<h3>5.6.2 (2018-06-05)</h3>

<h4>Bug fixes</h4>

<p>In the walker, go back to allowing the <code>baseVisitor</code> argument to be null to default to the default base everywhere.</p>

<h3>5.6.1 (2018-06-01)</h3>

<h4>Bug fixes</h4>

<p>Fix regression when passing <code>null</code> as fourth argument to <code>walk.recursive</code>.</p>

<h3>5.6.0 (2018-05-31)</h3>

<h4>Bug fixes</h4>

<p>Fix a bug in the walker that caused a crash when walking an object pattern spread.</p>

<h3>5.5.1 (2018-03-06)</h3>

<h4>Bug fixes</h4>

<p>Fix regression in walker causing property values in object patterns to be walked as expressions.</p>

<h3>5.5.0 (2018-02-27)</h3>

<h4>Bug fixes</h4>

<p>Support object spread in the AST walker.</p>

<h3>5.4.1 (2018-02-02)</h3>

<h4>Bug fixes</h4>

<p>5.4.0 somehow accidentally included an old version of walk.js.</p>

<h3>5.2.0 (2017-10-30)</h3>

<h4>Bug fixes</h4>

<p>The <code>full</code> and <code>fullAncestor</code> walkers no longer visit nodes multiple times.</p>

<h3>5.1.0 (2017-07-05)</h3>

<h4>New features</h4>

<p>New walker functions <code>full</code> and <code>fullAncestor</code>.</p>

<h3>3.2.0 (2016-06-07)</h3>

<h4>New features</h4>

<p>Make it possible to use <code>visit.ancestor</code> with a walk state.</p>

<h3>3.1.0 (2016-04-18)</h3>

<h4>New features</h4>

<p>The walker now allows defining handlers for <code>CatchClause</code> nodes.</p>

<h3>2.5.2 (2015-10-27)</h3>

<h4>Fixes</h4>

<p>Fix bug where the walker walked an exported <code>let</code> statement as an expression.</p>

<hr>

<p>本文由模极社发布</p>

<h4> 内容概览</h4>

<table>
<tr><td>分类</td><td>要点</td><td>建议/说明</td></tr>
<tr><td>核心概念</td><td>7.2.0 (2020-06-17)</td><td>详见正文</td></tr>
<tr><td>操作步骤</td><td>7.2.0 (2020-06-17)</td><td>详见正文</td></tr>
<tr><td>注意事项</td><td>7.2.0 (2020-06-17)</td><td>详见正文</td></tr>
<tr><td>适用场景</td><td>7.2.0 (2020-06-17)</td><td>详见正文</td></tr>
<tr><td>常见问题</td><td>7.2.0 (2020-06-17)</td><td>详见正文</td></tr>
</table>

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<p>新手建议收藏，老手欢迎指点。</p>