Handle triple-quoted JSX attribute values

docs/v2/annotated-source/nodes.html

@@ -3414,7 +3414,7 @@ <h3 id="jsx">JSX</h3>
     @value =
       <span class="hljs-keyword">if</span> value?
         value = value.base
-        <span class="hljs-keyword">if</span> value <span class="hljs-keyword">instanceof</span> StringLiteral
+        <span class="hljs-keyword">if</span> value <span class="hljs-keyword">instanceof</span> StringLiteral <span class="hljs-keyword">and</span> <span class="hljs-keyword">not</span> value.shouldGenerateTemplateLiteral()
           value
         <span class="hljs-keyword">else</span>
           <span class="hljs-keyword">new</span> JSXExpressionContainer value
@@ -9327,13 +9327,13 @@ <h3 id="stringwithinterpolations">StringWithInterpolations</h3>
 
             <div class="content"><div class='highlight'><pre>
 <span class="hljs-built_in">exports</span>.StringWithInterpolations = <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">StringWithInterpolations</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Base</span></span>
-  constructor: <span class="hljs-function"><span class="hljs-params">(@body, {@quote, @startQuote} = {})</span> -&gt;</span>
+  constructor: <span class="hljs-function"><span class="hljs-params">(@body, {@quote, @startQuote, @jsxAttribute} = {})</span> -&gt;</span>
     super()
 
   @fromStringLiteral: <span class="hljs-function"><span class="hljs-params">(stringLiteral)</span> -&gt;</span>
     updatedString = stringLiteral.withoutQuotesInLocationData()
     updatedStringValue = <span class="hljs-keyword">new</span> Value(updatedString).withLocationDataFrom updatedString
-    <span class="hljs-keyword">new</span> StringWithInterpolations Block.wrap([updatedStringValue]), quote: stringLiteral.quote
+    <span class="hljs-keyword">new</span> StringWithInterpolations Block.wrap([updatedStringValue]), quote: stringLiteral.quote, jsxAttribute: stringLiteral.jsxAttribute
     .withLocationDataFrom stringLiteral
 
   children: [<span class="hljs-string">&#x27;body&#x27;</span>]</pre></div></div>

docs/v2/test.html

@@ -27004,6 +27004,27 @@ <h2>Another heading</h2>
     });
   '''
 
+test '#5352: triple-quoted non-interpolated attribute values', ->
+  eqJS '''
+    <div a="""
+      b
+      c
+    """ />
+  ''', '''
+    <div a={`b
+    c`} />;
+  '''
+
+  eqJS """
+    <div a='''
+      b
+      c
+    ''' />
+  """, '''
+    <div a={`b
+    c`} />;
+  '''
+
 </script>
 <script type="text/x-literate-coffeescript" class="test" id="literate">
 # Literate CoffeeScript Test

src/nodes.coffee

@@ -1712,7 +1712,7 @@ exports.JSXAttribute = class JSXAttribute extends Base
     @value =
       if value?
         value = value.base
-        if value instanceof StringLiteral
+        if value instanceof StringLiteral and not value.shouldGenerateTemplateLiteral()
           value
         else
           new JSXExpressionContainer value
@@ -5150,13 +5150,13 @@ exports.Parens = class Parens extends Base
 #### StringWithInterpolations
 
 exports.StringWithInterpolations = class StringWithInterpolations extends Base
-  constructor: (@body, {@quote, @startQuote} = {}) ->
+  constructor: (@body, {@quote, @startQuote, @jsxAttribute} = {}) ->
     super()
 
   @fromStringLiteral: (stringLiteral) ->
     updatedString = stringLiteral.withoutQuotesInLocationData()
     updatedStringValue = new Value(updatedString).withLocationDataFrom updatedString
-    new StringWithInterpolations Block.wrap([updatedStringValue]), quote: stringLiteral.quote
+    new StringWithInterpolations Block.wrap([updatedStringValue]), quote: stringLiteral.quote, jsxAttribute: stringLiteral.jsxAttribute
     .withLocationDataFrom stringLiteral
 
   children: ['body']

test/jsx.coffee

@@ -946,3 +946,24 @@ test '“Adjacent” tags on separate lines should still compile', ->
       return <b />;
     });
   '''
+
+test '#5352: triple-quoted non-interpolated attribute values', ->
+  eqJS '''
+    <div a="""
+      b
+      c
+    """ />
+  ''', '''
+    <div a={`b
+    c`} />;
+  '''
+
+  eqJS """
+    <div a='''
+      b
+      c
+    ''' />
+  """, '''
+    <div a={`b
+    c`} />;
+  '''