Tri-state Check box in HTML?

There is no way to have a tri-state check button (yes, no, null) in HTML, right?

Are there any simple tricks or work-arounds without having to render the whole thing by oneself?

Tri-state Check box in HTML?, If the set contains both some checked and unchecked checkboxes, the mixed state checkbox is partially checked. Activating the tri-state checkbox changes the � Three state checkboxes could easily be implemented in current HTML markup. A new type attribute could be introduced to indicate the number of states desired. Something like:

You could use HTML's indeterminate IDL attribute on input elements.

Checkbox Example (Mixed-State), Default to checked, HTML5 --> <input type="checkbox" checked>. Visually, there are actually three states a checkbox can be in: checked,� HTML does not support tri-state checkboxes by default. There is an indeterminate attribute to indicate that the value is undefined but there is no way to set a checkbox back to indeterminate through the user interface once it has been checked or unchecked. The attribute can only be changed with JavaScript. Current State in HTML and JavaScript

Indeterminate Checkboxes, Three state checkboxes could easily be implemented in current HTML markup. A new type attribute could be introduced to indicate the number� Tri-state Check box in HTML?: see my answer to Tri-state Check box in HTML?: see my answer to Tri-state Check box in HTML?:

You can use an indeterminate state: http://css-tricks.com/indeterminate-checkboxes/. It's supported by the browsers out of the box and don't require any external js libraries.

Introducing the Three State Checkbox | by Carson Ford, jQuery tristate (indeterminate) checkbox with pseudo selectors and optional You can control the behaviour of the tristate input using HTML expando (non-� The Tri-State CheckBox mode of RadTreeView is enabled by setting the TriStateCheckBoxes property of the control to True. A prerequisite for this mode to work is to have enabled also CheckBoxes for Nodes. An addition to the Tri-State CheckBox mode of RadTreeView is the "Check Child Nodes" functionality.

You can use radio groups to achieve that functionality:

<input type="radio" name="choice" value="yes" />Yes
<input type="radio" name="choice" value="No" />No
<input type="radio" name="choice" value="null" />null

jQuery.Tristate, Maximize HTML Editor; Minimize HTML Editor; Fold All; Unfold All. xxxxxxxxxx. 11. 1. <div>. 2. <input id="yes" type="radio" name="field" value="yes" checked>. 3 . true if the CheckBox is able to display three check states; otherwise, false. The default value is false.

Tristate checkbox without javascript (pure css), Checkbox (Tri-State). A tri-state checkbox can be checked, not checked, or partially checked. The condition Initial HTML Markup. All checkbox tristate groups� var checkbox = document.getElementById("some-checkbox"); checkbox.indeterminate = true; or jQuery style: $("#some-checkbox").prop("indeterminate", true); // prop is jQuery 1.6+ The indeterminate state is visual only. The checkbox is still either checked or unchecked as a state.

Checkbox (Tri-State), JavaFX supports tristate checkboxes, the javafx.scene.control.CheckBox class represents a checkbox and it contains three boolean properties� Access checkboxes by default are two-state (true/false). However, there is a triple-state property located under the Data Tab in the checkbox's property sheet (see Figure 1). With the triple-state set to YES, a checkbox can accommodate true/false and NULL data. True appears checked, False appears clear and NULL appears 'grey'. Piece of cake, right?

What is tri state checkBox, How to create a tri state , Note: Checkboxes cannot be indeterminate with HTML - it is a property of the checkbox object, which can be set to true by JavaScript. Radio buttons are� Sample tri-state checkboxes Some applications use checkboxes that allow an indeterminate state in addition to the two provided by a normal checkbox. This third state is shown as a square or dash in the checkbox, and indicates that its state is neither checked nor unchecked.

Comments
  • Functionally, what's the difference between 'no' and 'null' in your usage?
  • Look at the answers below (except for mine). "Null" means something like "No answer"...
  • Exactly. It's an item with ancestors and "null" means "use parent value".
  • An alternative usage for a tri-state checkbox is when searching/filtering. For example, let's assume I've got an interface to search a list of used cars. One of the search options may be whether or not the car has a sunroof. The three states could be used as follows: Only show cars WITH a sunroof Only show cars WIHTOUT a sunroof Show both Now, certainly, this can be handled a number of ways... we could us a dropdown, or we could use a set of three radio buttons... but a tri-state checkbox (that is either empty, has a green check, or has a red x in it) is also a nice solution.
  • It would be useful for a list of checkboxes, with one checkbox at the head of the list to either check or uncheck all the remaining boxes. If all are checked, then the header checkbox can reflect that. If all are unchecked then the header checkbox can reflect that too. If the list contains a combination of checked and unchecked boxes, then showing the header checkbox in an intermediate state would provide visual feedback. That header checkbox would never carry a value - it is just a visual cue and UI aid. Being able to switch the head checkbox between all three states also would be handy.
  • I modified it to use HTML5's indeterminate attribute.
  • Tested in chrome v35 and the "all" check box only checks the other boxes on the first time clicked. After this it only works to un-check the other check boxes. Fixed in this version: jsfiddle.net/CHRSb/1
  • .prop('checked', ...) should be used instead of .attr('checked', ...).
  • I fixed the bugs Ross pointed out; new fiddle here.
  • According to Bert Bos in an email from 2002 (<lists.w3.org/Archives/Public/www-dom/2002JanMar/0014.html>), IE/Win and IE/Mac have supported it since version 4. Firefox appears to have implemented it in version 3.6. It also appears to have been implemented in Safari in 2008. I think that makes not a lot of end users.
  • use this url (help.dottoro.com/ljuocesd.php) instead. It shows who supports it (everyone bar opera), since when, and visually displays what it is. People are scared of the spec pages. +1 for this not-a-plugin solution