Why does my jQuery click handler appear to run multiple times for some of its targets?

Question

I apply:

$(\".newContentLink\").click(function() {
    $(\"#test\").append(\"1\");
});

On this:

Answer 1

To make sure the function only execute once on one click event you may use $(".newContentLink").one();

$(".newContentLink").one(function() {
    $("#test").append("1");
});