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How to determine whether a certain item is checked in js

anonymityOriginal: 2019-05-29 11:36:413506browse

js determines whether input checked is selected code example

checked attribute sets or returns whether the checkbox should be selected.

Syntax

checkboxObject.checked=true|false

This attribute saves the current state of the checkbox. Whenever this value changes, onclick The event handler will be triggered (the onchange event handler may also be triggered).

Example

The following example can set the status of the checkbox:

        <html>
        <head>
        <script type="text/javascript">
        function check()
          {
          document.getElementById("check1").checked=true
          }
        function uncheck()
          {
          document.getElementById("check1").checked=false
          }
        </script>
        </head>
        <body>
        <form>
        <input type="checkbox" id="check1" />
        <input type="button" onclick="check()" value="Check Checkbox" />
        <input type="button" onclick="uncheck()" value="Uncheck Checkbox" />
        </form>
        </body>
        </html>

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checkbox JS 事件 input

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