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<a href="vscode.TextDocumentWillSaveEvent.html">TextDocumentWillSaveEvent</a>
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<h1>Interface TextDocumentWillSaveEvent</h1>
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<p>An event that is fired when a <a href="vscode.TextDocument.html">document</a> will be saved.</p>
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<p>To make modifications to the document before it is being saved, call the
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<a href="vscode.TextDocumentWillSaveEvent.html#waitUntil"><code>waitUntil</code></a>-function with a thenable
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that resolves to an array of <a href="../classes/vscode.TextEdit.html">text edits</a>.</p>
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<h3>层级</h3>
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<li>
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<span class="target">TextDocumentWillSaveEvent</span>
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</li>
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</ul>
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<section class="tsd-index-section ">
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<h3>Properties（2）</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-property tsd-parent-kind-interface"><a href="vscode.TextDocumentWillSaveEvent.html#document" class="tsd-kind-icon">document</a></li>
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<li class="tsd-kind-property tsd-parent-kind-interface"><a href="vscode.TextDocumentWillSaveEvent.html#reason" class="tsd-kind-icon">reason</a></li>
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</ul>
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</section>
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<section class="tsd-index-section ">
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<h3>Methods（1）</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-method tsd-parent-kind-interface"><a href="vscode.TextDocumentWillSaveEvent.html#waitUntil" class="tsd-kind-icon">wait<wbr>Until</a></li>
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</ul>
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</section>
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</div>
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</section>
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</section>
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<section class="tsd-panel-group tsd-member-group ">
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<h2>Properties（2）</h2>
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<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface">
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<a name="document" class="tsd-anchor"></a>
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<h3><span class="tsd-flag ts-flagReadonly">Readonly</span> document</h3>
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<div class="tsd-signature tsd-kind-icon">document<span class="tsd-signature-symbol">:</span> <a href="vscode.TextDocument.html" class="tsd-signature-type" data-tsd-kind="Interface">TextDocument</a></div>
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api-cn/blob/431f26f/vscode.d.ts#L10317">vscode.d.ts:10317</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>The document that will be saved.</p>
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</div>
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</div>
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</section>
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<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface">
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<a name="reason" class="tsd-anchor"></a>
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<h3><span class="tsd-flag ts-flagReadonly">Readonly</span> reason</h3>
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<div class="tsd-signature tsd-kind-icon">reason<span class="tsd-signature-symbol">:</span> <a href="../enums/vscode.TextDocumentSaveReason.html" class="tsd-signature-type" data-tsd-kind="Enumeration">TextDocumentSaveReason</a></div>
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api-cn/blob/431f26f/vscode.d.ts#L10322">vscode.d.ts:10322</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>The reason why save was triggered.</p>
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</div>
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</div>
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</section>
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</section>
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<section class="tsd-panel-group tsd-member-group ">
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<h2>Methods（1）</h2>
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<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
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<a name="waitUntil" class="tsd-anchor"></a>
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<h3>wait<wbr>Until</h3>
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<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
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<li class="tsd-signature tsd-kind-icon">wait<wbr>Until<span class="tsd-signature-symbol">(</span>thenable<span class="tsd-signature-symbol">: </span><a href="Thenable.html" class="tsd-signature-type" data-tsd-kind="Interface">Thenable</a><span class="tsd-signature-symbol"><</span><a href="../classes/vscode.TextEdit.html" class="tsd-signature-type" data-tsd-kind="Class">TextEdit</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
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<li class="tsd-signature tsd-kind-icon">wait<wbr>Until<span class="tsd-signature-symbol">(</span>thenable<span class="tsd-signature-symbol">: </span><a href="Thenable.html" class="tsd-signature-type" data-tsd-kind="Interface">Thenable</a><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">></span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api-cn/blob/431f26f/vscode.d.ts#L10344">vscode.d.ts:10344</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>Allows to pause the event loop and to apply <a href="../classes/vscode.TextEdit.html">pre-save-edits</a>.
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Edits of subsequent calls to this function will be applied in order. The
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edits will be <em>ignored</em> if concurrent modifications of the document happened.</p>
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</div>
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<p><em>Note:</em> This function can only be called during event dispatch and not
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in an asynchronous manner:</p>
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<pre><code class="language-ts"><span style="color: #001080">workspace</span><span style="color: #000000">.</span><span style="color: #795E26">onWillSaveTextDocument</span><span style="color: #000000">(</span><span style="color: #001080">event</span><span style="color: #000000"> </span><span style="color: #0000FF">=></span><span style="color: #000000"> {</span>
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<span style="color: #000000"> </span><span style="color: #008000">// async, will *throw* an error</span>
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<span style="color: #000000"> </span><span style="color: #795E26">setTimeout</span><span style="color: #000000">(() </span><span style="color: #0000FF">=></span><span style="color: #000000"> </span><span style="color: #001080">event</span><span style="color: #000000">.</span><span style="color: #795E26">waitUntil</span><span style="color: #000000">(</span><span style="color: #001080">promise</span><span style="color: #000000">));</span>
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<span style="color: #000000"> </span><span style="color: #008000">// sync, OK</span>
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<span style="color: #000000"> </span><span style="color: #001080">event</span><span style="color: #000000">.</span><span style="color: #795E26">waitUntil</span><span style="color: #000000">(</span><span style="color: #001080">promise</span><span style="color: #000000">);</span>
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<span style="color: #000000">})</span>
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</code></pre>
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</div>
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<h4 class="tsd-parameters-title">Parameters</h4>
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<ul class="tsd-parameters">
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<li>
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<h5>thenable: <a href="Thenable.html" class="tsd-signature-type" data-tsd-kind="Interface">Thenable</a><span class="tsd-signature-symbol"><</span><a href="../classes/vscode.TextEdit.html" class="tsd-signature-type" data-tsd-kind="Class">TextEdit</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></h5>
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<div class="tsd-comment tsd-typography">
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<p>A thenable that resolves to <a href="../classes/vscode.TextEdit.html">pre-save-edits</a>.</p>
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</div>
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</li>
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</ul>
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<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
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</li>
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<li class="tsd-description">
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api-cn/blob/431f26f/vscode.d.ts#L10353">vscode.d.ts:10353</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>Allows to pause the event loop until the provided thenable resolved.</p>
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</div>
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<p><em>Note:</em> This function can only be called during event dispatch.</p>
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</div>
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<h4 class="tsd-parameters-title">Parameters</h4>
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<ul class="tsd-parameters">
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<li>
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<h5>thenable: <a href="Thenable.html" class="tsd-signature-type" data-tsd-kind="Interface">Thenable</a><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">></span></h5>
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<div class="tsd-comment tsd-typography">
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<p>A thenable that delays saving.</p>
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</div>
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</li>
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</ul>
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<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
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</li>
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</section>
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