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Home/ Questions/Q 3457412
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Editorial Team
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Editorial Team
Asked: May 18, 20262026-05-18T09:51:25+00:00 2026-05-18T09:51:25+00:00

I have 2 checkboxes, consider chk1 and chk2. If one checkbox is checked, the

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I have 2 checkboxes, consider chk1 and chk2. If one checkbox is checked, the second checkbox should be checked automatically and not viceversa. What should be the javascript? Can someone help me? Thank you!!

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  1. Editorial Team
    Editorial Team
    2026-05-18T09:51:25+00:00Added an answer on May 18, 2026 at 9:51 am

    Here’s a simple inline version to demonstrate the general idea. You might want to pull it out into a separate function in real world usage.

    If you want chk2 to automatically stay in sync with any changes to chk1, but not do anything when chk2 is clicked go with this.

     <input id="chk1" type="checkbox" onclick="document.getElementById('chk2').checked = this.checked;">
     <input id="chk2" type="checkbox">
    

    This version will only change chk2 when chk1 is checked, but not do anything when ck1 is unchecked.

     <input id="chk1" type="checkbox" onclick="if (this.checked) document.getElementById('chk2').checked = true;">
     <input id="chk2" type="checkbox">
    
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