Thymeleaf - How to add checked attribute to input conditionally

html thymeleaf html-input
mtyurt picture mtyurt · Apr 23, 2015 · Viewed 65.5k times · Source

As you know, input component has an attribute, checked to whether mark the checkbox as enabled by default or not. 

<input type="checkbox" name="mycheckbox" checked="checked"/>

To disable the checkbox by default, the checked exception should be declared. Is it possible to set checked attribute by a flag in Thymeleaf?

Answer

Faraj Farook picture Faraj Farook · Apr 28, 2015

According to the official thymeleaf documentation

http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html#fixed-value-boolean-attributes

th:checked is considered as a fixed-value Boolean attribute.

<input type="checkbox" name="active" th:checked="${user.active}" />

Where user.active should be a boolean.

So in your case it should be as Andrea mentioned,

<input type="checkbox" name="mycheckbox" th:checked="${flag}" />

Related questions

Using Thymeleaf when the value is null

I have some values in my database which can be null if they have not already been entered. But when I use Thymeleaf in my html, it gives an error when parsing null values. Is there any way to handle …

Read More
How to set thymeleaf th:field value from other variable

I have a simple text input field where i have to set default value from one object and save its final value in other. The following code is not working. <div th:object="${form}"> <input class="form-control" …

Read More
Thymeleaf: how to use conditionals to dynamically add/remove a CSS class

By using Thymeleaf as template engine, is it possible to add/remove dynamically a CSS class to/from a simple div with the th:if clause? Normally, I could use the conditional clause as follows: <a href="lorem-ipsum.html" …

Read More