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Toggle Checkboxes on/off

You can write:

$(document).ready(function() {    $("#select-all-teammembers").click(function() {        var checkBoxes = $("input[name=recipients\\[\\]]");        checkBoxes.prop("checked", !checkBoxes.prop("checked"));    });                 });

Before jQuery 1.6, when we only had attr() and not prop(), we used to write:

checkBoxes.attr("checked", !checkBoxes.attr("checked"));

But prop() has better semantics than attr() when applied to "boolean" HTML attributes, so it is usually preferred in this situation.

 

 

ref: https://stackoverflow.com/questions/4177159/toggle-checkboxes-on-off

Toggle Checkboxes on/off