Fixes #386 - Allow regular expression for an HTML attribute value

compiler/ast/HtmlAttribute/html/generateCode.js

@@ -121,7 +121,13 @@ module.exports = function generateCode(node, codegen) {
     }
 
     if (node.isLiteralValue()) {
-        return builder.htmlLiteral(attr(name, value.value));
+        let literalValue = value.value;
+
+        if (literalValue instanceof RegExp) {
+            literalValue = literalValue.source;
+        }
+
+        return builder.htmlLiteral(attr(name, literalValue));
     } else if (value != null) {
         return generateCodeForExpressionAttr(name, value, escape, codegen);
     } else if (argument) {

test/autotests/render/pattern-attr/expected.html

@@ -0,0 +1 @@
+<input type="text" pattern="\w{2,20}">

test/autotests/render/pattern-attr/template.marko

@@ -0,0 +1 @@
+<input type="text" pattern=/\w{2,20}/ />

test/autotests/render/pattern-attr/test.js

@@ -0,0 +1 @@
+exports.templateData = {};