How to set CheckBox have a default of checked status of the javascript-ui in HTML SDK ?

[flying008]

Dear all, hello !

When tried to control the CheckBox to be checked by default at  loading through the code dataDemoItem.setValue(true). However, no matter what,  the CheckBox in the GUI interface is always unchecked by default.  I don’t know where the problem lies? Can you give an explanation and solution?

[TUSHAR050392]

@flying008 I am unsure why this is happening but my guess, it is due to the tool property because you can check multiple boxes probably. Have you tried using the radio button tool? It is going to work in a similar way as check box but you can only select one value at a time and the first tool is always selected as default.

[flying008]

Hi, @TUSHAR050392 

Thank you for your reply !  I'm try use only one checkbox for turn on / off a contain box, so can you help me set the checkbox have a default of checked status as loaded first?