Why is my checkout checkbox not functioning correctly?

Store Design
4

i put this code in theme.editor.js bcz there is no theme.js file or theme.js.liquid file

$(document).ready(function() {
$(‘body’).on(‘click’, ‘[name=“checkout”], function() {
if ($(’#agree’).is(‘:checked’)) {
$(this).submit();
}
else {
alert(“You must agree with the terms and conditions of sales to check out.”);
return false;
}
});
});

and them then i put this on my head in theme.liquid file and still there is no results