diff --git a/app/Config/View.php b/app/Config/View.php
index 78cd547e3b8f..340e266b09d7 100644
--- a/app/Config/View.php
+++ b/app/Config/View.php
@@ -43,6 +43,16 @@ class View extends BaseView
      */
     public $plugins = [];
 
+    /**
+     * Whether to use Parser conditionals (if, else, and elseif).
+     *
+     * This setting is for compatibility with templates that works on CodeIgniter3.
+     * If you have JavaScript code in templates, Parser may raise error
+     * when there are strings that can be interpreted as conditionals.
+     * In that case, set this false.
+     */
+    public bool $enableConditionals = true;
+
     /**
      * View Decorators are class methods that will be run in sequence to
      * have a chance to alter the generated output just prior to caching
diff --git a/system/View/Parser.php b/system/View/Parser.php
index 6834c003e500..820030839f69 100644
--- a/system/View/Parser.php
+++ b/system/View/Parser.php
@@ -59,6 +59,16 @@ class Parser extends View
      */
     protected $dataContexts = [];
 
+    /**
+     * Whether to use Parser conditionals (if, else, and elseif).
+     *
+     * This setting is for compatibility with templates that works on CodeIgniter3.
+     * If you have JavaScript code in templates, Parser may raise error
+     * when there are strings that can be interpreted as conditionals.
+     * In that case, set this false.
+     */
+    protected bool $enableConditionals = true;
+
     /**
      * Constructor
      *
@@ -72,6 +82,8 @@ public function __construct(ViewConfig $config, ?string $viewPath = null, $loade
         // Ensure user plugins override core plugins.
         $this->plugins = $config->plugins ?? [];
 
+        $this->enableConditionals = $config->enableConditionals ?? $this->enableConditionals;
+
         parent::__construct($config, $viewPath, $loader, $debug, $logger);
     }
 
@@ -223,8 +235,10 @@ protected function parse(string $template, array $data = [], ?array $options = n
         $template = $this->parseComments($template);
         $template = $this->extractNoparse($template);
 
-        // Replace any conditional code here so we don't have to parse as much
-        $template = $this->parseConditionals($template);
+        if ($this->enableConditionals) {
+            // Replace any conditional code here so we don't have to parse as much
+            $template = $this->parseConditionals($template);
+        }
 
         // Handle any plugins before normal data, so that
         // it can potentially modify any template between its tags.
diff --git a/tests/system/View/ParserTest.php b/tests/system/View/ParserTest.php
index 3462b0cc2a84..b2076a0791dd 100644
--- a/tests/system/View/ParserTest.php
+++ b/tests/system/View/ParserTest.php
@@ -938,4 +938,38 @@ public function testRenderFindsOtherView()
         $expected = '<h1>Hello World</h1>';
         $this->assertSame($expected, $this->parser->render('Simpler.html'));
     }
+
+    /**
+     * @see https://github.com/codeigniter4/CodeIgniter4/issues/5831
+     */
+    public function testEnableConditionalsFalse()
+    {
+        $this->config->enableConditionals = false;
+        $this->parser                     = new Parser($this->config, $this->viewsDir, $this->loader);
+
+        $data = [
+            'message' => 'Warning!',
+        ];
+        $this->parser->setData($data);
+
+        $template = <<<'EOL'
+            <script type="text/javascript">
+             var f = function() {
+                 if (true) {
+                     alert('{message}');
+                 }
+             }
+            </script>
+            EOL;
+        $expected = <<<'EOL'
+            <script type="text/javascript">
+             var f = function() {
+                 if (true) {
+                     alert('Warning!');
+                 }
+             }
+            </script>
+            EOL;
+        $this->assertSame($expected, $this->parser->renderString($template));
+    }
 }