What is the difference between attr() and prop() in jQuery?

<input type="checkbox" id="c" checked>

$('#c').prop('checked', false);
console.log('prop: ' + $('#c').prop('checked'));
console.log('is checked: ' + $('#c').is(':checked'));

The property shows the live state (false now), while the attribute in the HTML is the starting value. In jQuery 4, attr('checked') also returns a different value than in 3.x, so always use prop(). See Get Content.

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