您可以在JS字符串打印的HTML标签上使用jQuery选择器吗？

Question

Sorry if the question was misleading, I couldn't find a better way to describe my problem. Anyway, here goes:

Suppose I had a button start that initially displays a string for me. Said string (let's call it stringA ) is output through jQuery like this:

$(".start").click(function() {
    $(".startButton").hide('slow', function() {
        $("#table1").html(stringA);
    });
});

Alright. Cool. That worked without a hitch. Now inside stringA I have multiple
<span class="optButton">this is a button</span> buttons. I have another onClick handler for my optButton button, and it goes like this:

$(".optButton").click(function() {
    alert("Testing");
    $("#table1").html(stringB);
});

Needless to say, clicking on optButton is supposed to replace the contents of #table1 with stringB . However, when I tried it, it doesn't work. I tried adding alert() to test and see if jQuery managed to select optButton , but it seems that it didn't because I get no popup from the alert() function.

My theory is that since optButton was not part of the original HTML and is within a string stringA , jQuery is unable to select optButton as a result. If this is true, is there a workaround to this issue? If it is not, what is the actual cause of the problem here?

Answer 1

You need to use event delegation since your span element has been dynamically added to the DOM:

$('#table1').on('click', '.optButton', function() {
    alert("Testing");
    $("#table1").html(stringB);
});

This technique will helps you to attach click handler to these newly created span elements.