You can use prop function to set "checked" property:
<script>
$(document).ready(function()
{
$('#bar1').prop('checked', true);
$('#radiobar1').prop('checked', true);
});
</script>
Working Example
<!DOCTYPE html>
<html lang="en">
<head>
<style>
#hiddenElement {
display: none;
}
#visibleElement {
display: block;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js"></script>
<script>
$(document).ready(function()
{
$('#bar1').prop('checked', true);
$('#radiobar1').prop('checked', true);
});
</script>
</head>
<body>
<div>
<input type="checkbox" name="foo1" value="bar1" id="bar1" />
<input type="checkbox" name="foo1" value="bar2" id="bar2" />
<input type="checkbox" name="foo1" value="bar3" id="bar3" />
</div>
<div>
<input type="radio" name="foo2" value="bar1" id="radiobar1" />
<input type="radio" name="foo2" value="bar2" id="radiobar2" />
<input type="radio" name="foo2" value="bar3" id="radiobar3" />
</div>
</body>
</html> Most Helpful This Week
How to define Global Variable in JavaScript?
How to change the height of Textarea on click?
How to scroll page to 1000px from top on page load using jQuery?
jQuery move multi select values from one to another multi select list
Get largest number from each sub-arrays
JavaScript calculate Fahrenheit from Celsius
jQuery get the coordinates of div clicked
Example to take user input and display on screen using JavaScript
How to change text color on click using JavaScript?
JavaScript HTML5 Validation for name and email field