fix: maintain whitespace around templated values (#156)

generator/generator.go

@@ -412,6 +412,14 @@ func stripNonCriticalElementWhitespace(input []parser.Node) (output []parser.Nod
 			output = append(output, curr)
 			continue
 		}
+
+		_, prevIsStringExpr := prev.(parser.StringExpression)
+		_, nextIsStringExpr := next.(parser.StringExpression)
+		if prevIsStringExpr || nextIsStringExpr {
+			// Allow whitespace that comes before or after a template expression.
+			output = append(output, curr)
+			continue
+		}
 	}
 	return
 }

generator/test-text-whitespace/render_test.go

@@ -35,6 +35,11 @@ func TestTextWhitespace(t *testing.T) {
 			input:    WhiteSpaceAroundValues(),
 			expected: WhiteSpaceAroundValuesExpected,
 		},
+		{
+			name:     "whitespace around templated values is maintained",
+			input:    WhiteSpaceAroundTemplatedValues("templ", "allows whitespace around templated values."),
+			expected: WhiteSpaceAroundTemplatedValuesExpected,
+		},
 	} {
 		w := new(strings.Builder)
 		err := test.input.Render(context.Background(), w)

generator/test-text-whitespace/template.templ

@@ -31,3 +31,9 @@ templ WhiteSpaceAroundValues() {
 }
 
 const WhiteSpaceAroundValuesExpected = `<p>templ allows strings to be included in sentences.</p>`
+
+const WhiteSpaceAroundTemplatedValuesExpected = `<div>templ allows whitespace around templated values.</div>`
+
+templ WhiteSpaceAroundTemplatedValues(prefix, statement string) {
+  <div>{prefix} {statement}</div>
+}