fix(render): pretty option including extra < in the Button (#1881)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: Bu Kinoshita <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.changeset/chilly-donkeys-worry.md

@@ -0,0 +1,5 @@
+---
+"@react-email/render": patch
+---
+
+Fix extra `<` characters being kept when rendering if mso comments under certain conditions

packages/react-email/src/cli/commands/testing/__snapshots__/export.spec.ts.snap

@@ -130,12 +130,12 @@ exports[`email export 1`] = `
                       style="background-color:rgb(0,0,0);border-radius:0.25rem;color:rgb(255,255,255);font-size:12px;font-weight:600;text-decoration-line:none;text-align:center;padding-left:1.25rem;padding-right:1.25rem;padding-top:0.75rem;padding-bottom:0.75rem;line-height:100%;text-decoration:none;display:inline-block;max-width:100%;mso-padding-alt:0px;padding:12px 20px 12px 20px"
                       target="_blank"
                       ><span
-                        <!--[if mso]><i style="mso-font-width:500%;mso-text-raise:18" hidden>&#8202;&#8202;</i><![endif]-->
+                        ><!--[if mso]><i style="mso-font-width:500%;mso-text-raise:18" hidden>&#8202;&#8202;</i><![endif]--></span
                       ><span
                         style="max-width:100%;display:inline-block;line-height:120%;mso-padding-alt:0px;mso-text-raise:9px"
                         >Join the team</span
                       ><span
-                        <!--[if mso]><i style="mso-font-width:500%" hidden>&#8202;&#8202;&#8203;</i><![endif]-->
+                        ><!--[if mso]><i style="mso-font-width:500%" hidden>&#8202;&#8202;&#8203;</i><![endif]--></span
                       ></a
                     >
                   </td>

packages/render/src/shared/utils/__snapshots__/pretty.spec.ts.snap

@@ -1,7 +1,9 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
 exports[`pretty > if mso syntax does not wrap 1`] = `
-"<!--[if mso]><i style="mso-font-width:100%;mso-text-raise:12" hidden>&#8202;&#8202;</i><![endif]-->
+"<span
+  ><!--[if mso]><i style="mso-font-width:100%;mso-text-raise:12" hidden>&#8202;&#8202;</i><![endif]--></span
+>
 "
 `;
 
@@ -68,12 +70,12 @@ exports[`pretty > should prettify Preview component's complex characters correct
                       style="line-height:100%;text-decoration:none;display:block;max-width:100%;mso-padding-alt:0px;background-color:#656ee8;border-radius:5px;color:#fff;font-size:16px;font-weight:bold;text-align:center;width:100%;padding:10px 10px 10px 10px"
                       target="_blank"
                       ><span
-                        <!--[if mso]><i style="mso-font-width:500%;mso-text-raise:15" hidden>&#8202;</i><![endif]-->
+                        ><!--[if mso]><i style="mso-font-width:500%;mso-text-raise:15" hidden>&#8202;</i><![endif]--></span
                       ><span
                         style="max-width:100%;display:inline-block;line-height:120%;mso-padding-alt:0px;mso-text-raise:7.5px"
                         >View your Stripe Dashboard</span
                       ><span
-                        <!--[if mso]><i style="mso-font-width:500%" hidden>&#8202;&#8203;</i><![endif]-->
+                        ><!--[if mso]><i style="mso-font-width:500%" hidden>&#8202;&#8203;</i><![endif]--></span
                       ></a
                     >
                     <hr

packages/render/src/shared/utils/pretty.spec.ts

@@ -15,7 +15,7 @@ describe('pretty', () => {
   test('if mso syntax does not wrap', async () => {
     expect(
       await pretty(
-        `<!--[if mso]><i style="mso-font-width:100%;mso-text-raise:12" hidden>&#8202;&#8202;</i><![endif]-->`,
+        `<span><!--[if mso]><i style="mso-font-width:100%;mso-text-raise:12" hidden>&#8202;&#8202;</i><![endif]--></span>`,
       ),
     ).toMatchSnapshot();
   });

packages/render/src/shared/utils/pretty.ts

@@ -1,28 +1,87 @@
 import type { Options, Plugin } from 'prettier';
+import type { builders } from 'prettier/doc';
 import html from 'prettier/plugins/html';
 import { format } from 'prettier/standalone';
 
+interface HtmlNode {
+  type: 'element' | 'text' | 'ieConditionalComment';
+  name?: string;
+  sourceSpan: {
+    start: { file: unknown[]; offset: number; line: number; col: number };
+    end: { file: unknown[]; offset: number; line: number; col: number };
+    details: null;
+  };
+  parent?: HtmlNode;
+}
+
+function recursivelyMapDoc(
+  doc: builders.Doc,
+  callback: (innerDoc: string | builders.DocCommand) => builders.Doc,
+): builders.Doc {
+  if (Array.isArray(doc)) {
+    return doc.map((innerDoc) => recursivelyMapDoc(innerDoc, callback));
+  }
+
+  if (typeof doc === 'object') {
+    if (doc.type === 'group') {
+      return {
+        ...doc,
+        contents: recursivelyMapDoc(doc.contents, callback),
+        expandedStates: recursivelyMapDoc(
+          doc.expandedStates,
+          callback,
+        ) as builders.Doc[],
+      };
+    }
+
+    if ('contents' in doc) {
+      return {
+        ...doc,
+        contents: recursivelyMapDoc(doc.contents, callback),
+      };
+    }
+
+    if ('parts' in doc) {
+      return {
+        ...doc,
+        parts: recursivelyMapDoc(doc.parts, callback) as builders.Doc[],
+      };
+    }
+
+    if (doc.type === 'if-break') {
+      return {
+        ...doc,
+        breakContents: recursivelyMapDoc(doc.breakContents, callback),
+        flatContents: recursivelyMapDoc(doc.flatContents, callback),
+      };
+    }
+  }
+
+  return callback(doc);
+}
+
 const modifiedHtml = { ...html } as Plugin;
 if (modifiedHtml.printers) {
   // eslint-disable-next-line @typescript-eslint/unbound-method
   const previousPrint = modifiedHtml.printers.html.print;
   modifiedHtml.printers.html.print = (path, options, print, args) => {
-    const node = path.getNode() as {
-      type: string;
-      sourceSpan: {
-        start: { file: unknown[]; offset: number; line: number; col: number };
-        end: { file: unknown[]; offset: number; line: number; col: number };
-        details: null;
-      };
-    };
+    const node = path.getNode() as HtmlNode;
+
+    const rawPrintingResult = previousPrint(path, options, print, args);
 
     if (node.type === 'ieConditionalComment') {
-      return options.originalText.slice(
-        node.sourceSpan.start.offset,
-        node.sourceSpan.end.offset,
-      );
+      const printingResult = recursivelyMapDoc(rawPrintingResult, (doc) => {
+        if (typeof doc === 'object' && doc.type === 'line') {
+          return doc.soft ? '' : ' ';
+        }
+
+        return doc;
+      });
+
+      return printingResult;
     }
-    return previousPrint(path, options, print, args);
+
+    return rawPrintingResult;
   };
 }