html
<span><a class="like-Unlike" href="">Like</a></span>
my.js
$(".like-Unlike").on('click',function (e) {
if ($(this).html() == "Like") {
$(this).html('Unlike');
}
else {
$(this).html('Like');
}
return false;
}
);
Problem is : the Like button doesn't work as a toggle button without error message, but after I return all the above javascript into console, it works.