. Web applications usually have only a few dozen templates. Lets give a name each of the things we see: Note that the prod iter variable will only be available inside the element (including inner tags like ). Here you have the complete set of Thymeleaf-enabled DTD declarations for all the supported flavours of XHTML: Also note that, in order for your IDE to be happy, and even if you are not working in a validating mode, you will need to declare the th namespace in your html tag: It is fine for our templates to have a DOCTYPE like: But it would not be fine for our web applications to send XHTML documents with this DOCTYPE to client browsers, because: Thats why Thymeleaf includes a mechanism for DOCTYPE translation, which will automatically translate your thymeleaf-specific XHTML DOCTYPEs into standard DOCTYPEs. x[@z="v"] means elements with name x and an attribute called z with value v. Markup Selectors understand the class attribute to be multivalued, and therefore allow the application of selectors on this attribute even if the element has several class values. So if you want to bind a list you have to do like below. No other value than "checked" is allowed according to the XHTML standards for the checked attribute (HTML5 rules are a little more relaxed on that). You can have a look at the complete syntax reference at the AttoParser documentation. This variable contains two pieces of data that can be used from within your templates: With our context object ready, all we need is executing the template engine specifying the template name and the context, and passing on the response writer so that the response can be written to it: Lets see the results of this using the Spanish locale: The simplest version of our Home page seems to be ready now, but there is something we have not thought about what if we had a message like this? Note that not all implementations might be able to determine the existence of a template before resolving, and thus could always consider a template as resolvable and break the resolution chain (not allowing other resolvers to check for the same template), but then be unable to read the real resource. Again, using the common_header example: See how the title argument (first argument of the common_header fragment) is set to no-op (_), which results in this part of the fragment not being executed at all (title = no-operation): The availability of both the empty fragment and no-operation token allows us to perform conditional insertion of fragments in a very easy and elegant way. 1,src/main/java/com/example/demo/FormController.java. Normally, an implementation based on .properties files will be used, but we could create our own implementations if we wanted, for example, to obtain messages from a database. As a prototype, it simply wouldnt look realistic enough we should have more than one product, we need more rows. Text literals are just character strings specified between single quotes. The main goal of Thymeleaf is to provide an elegant and well-formed way of creating templates. There is an important difference though: the asterisk syntax evaluates expressions on selected objects rather than on the whole context. Note that the template name you use in th:include/th:replace tags will have to be resolvable by the Template Resolver currently being used by the Template Engine. This chapter will explain the way in which we can set (or modify) values of attributes in our markup. What if we wanted to add a message resolver (or more) to the Template Engine? The ability to do this is a feature usually called Natural Templating. Lets imagine we have an i18n Messages_fr.properties entry containing an OGNL expression calling a language-specific static method, like: and a Messages_es.properties equivalent: We can create a fragment of markup that evaluates one expression or the other depending on the locale. For example, imagine we want to show in our product table a column with the number of comments that exist for each product and, if there are any comments, a link to the comment detail page for that product. There is no intention at all to deprecate the namespaced syntax in the future. A big advantage of this approach to fragments is that you can write your fragments code in pages that are perfectly displayable by a browser, with a complete and even validating XHTML structure, while still retaining the ability to make Thymeleaf include them into other templates. Note that as soon as one th:case attribute is evaluated as true, every other th:case attribute in the same switch context is evaluated as false. Out-of-the-box, Thymeleaf allows you to process six kinds of templates, each of which is called a Template Mode: All of these modes refer to well-formed XML files except the Legacy HTML5 mode, which allows you to process HTML5 files with features such as standalone (not closed) tags, tag attributes without a value or not written between quotes. Direct selectors and attribute selectors can be mixed: a.external[@href^='https']. For that, we will use th:inline="none": Text inlining is very similar to the expression inlining capability we have just seen, but it actually adds more power. The most common use is for fragment insertion using th:insert or th:replace (more on these in a later section): But they can be used anywhere, just as any other variable: Later in this tutorial there is an entire section devoted to Template Layout, including deeper explanation of fragment expressions. The asterisk syntax evaluates expressions on selected objects rather than on the whole context. But outputting something unescaped might be what we need if we are building parts of our script by means of appending inlined expressions, so its good to have this tool at hand. You have to track the index of the list and bind the value separately (id and context) in the correct index. Now we know a lot about using Thymeleaf, we can add some new pages to our website for order management. There are some specialized expressions that we will be able to use to obtain the request parameters and the request, session and application attributes from the WebContext in our templates. Unqualified expressions are evaluated against this object. For now, this is all we need. Well, dont worry because that is exactly what the next chapter is about. Thymeleaf prototype-only comment blocks, 12.2 Script inlining (JavaScript and Dart). MyColors. This StandardMessageResolver, which looks for messages files with the same name as the template in the way already explained, is in fact the only message resolver implementation offered by Thymeleaf core out of the box, although of course you can create your own by just implementing the org.thymeleaf.messageresolver.IMessageResolver interface. DOM Selectors understand the class attribute to be multivalued, and therefore allow the application of selectors on this attribute even if the element has several class values. These tokens allow a little bit of simplification in Standard Expressions. //x means children of the current node with name x, at any depth. The ${today} expression simply means get the variable called today, but these expressions could be more complex (like ${user.name} for get the variable called user, and call its getName() method). Each of our products will be displayed in a row (a element), and so for our template we will need to create a template row one that will exemplify how we want each product to be displayed and then instruct Thymeleaf to iterate it once for each product. .oneclass is equivalent to [class='oneclass']. But Thymeleaf also allows us to completely decouple the template markup from its logic, allowing the creation of completely logic-less markup templates in the HTML and XML template modes. Spring In XHTML, these attributes take just 1 value, which is itself. For example, while a JSP using tag libraries could include a fragment of code not directly displayable by a browser like: the Thymeleaf Standard Dialect would allow us to achieve the same functionality with: Not only will this be correctly displayed by browsers, but this also allow us to (optionally) specify a value attribute in it (James Carrot, in this case) that will be displayed when the prototype is statically opened in a browser, and that will be substituted by the value resulting from the evaluation of ${user.name} during processing of the template. In order to specify a value for our parameter, and given an HTTP session attribute called user, we could have: Note that the use of th:utext here means that the formatted message will not be escaped. Some XHTML/HTML5 attributes are special in that, either they are present in their elements with a specific and fixed value, or they are not present at all. Note the difference with: which will actually look for any elements with class="myfrag", without caring about th:fragment signatures (or th:ref references). The Thymeleaf Standard Dialect can process templates in any mode, but is especially suited for web-oriented template modes (XHTML and HTML5 ones). These attributes will be evaluated once the fragment is included into the target template (the one with the th:include/th:replace attribute), and they will be able to reference any context variables defined in this target template. A thymeleaf namespace is also being declared for th:* attributes: Note that, if we hadnt cared about our templates validity or well-formedness at all, we could have simply specified a standard XHTML 1.0 Strict DOCTYPE, along with no xmlns namespace declarations: and this would still be perfectly processable by Thymeleaf in the XHTML mode (although probably our IDE would make our life quite miserable showing warnings everywhere). This can be used, for example, for the th:block element (or also th-block), which will be explained in a later section. Lets use the th:remove attribute on the second and third tags: Once processed, everything will look again as it should: And what does that all value in the attribute, mean? I can't understand what you are saying. For the same reason as template resolvers: message resolvers are ordered and if the first one cannot resolve a specific message, the second one will be asked, then the third, etc. Lets have a look at an example fragment (introducing another attribute modifier, this time th:class): All three parts of a conditional expression (condition, then and else) are themselves expressions, which means that they can be variables (${}, *{}), messages (#{}), URLs (@{}) or literals (''). If we execute this template like before, we will obtain: Which is not exactly what we expected, because our tag has been escaped and therefore it will be displayed in the browser. Rear wheel with wheel nut very hard to unscrew. We need a way to remove those two rows during template processing. Note the use of the title and links variables in the fragment below: and the result will use the actual