JQuery assign events to buttons

buttonclick, javascript, jquery, onclick, onclicklistener

Solution

Event listeners cost memory. You have to think carefully about how you should implement the listeners.

1. The straightforward way:

Do not use this

If the behaviour for each button is the same, use a class:

$(".btn").click(function() {
    // Do something
});

If behaviour for each button is different, assign events to different #IDs

$("#btn1").click(function {
    // Do something
});

2. Use .on():

jQuery 1.7 introduced .on() method that wraps all listeners to 1 method.

$("button").on("click", function() {
    // Do something
});

However, we are still binding many listeners on the page.

3. Use a wrapper (use this!):

Wrap your buttons with a div and create one listener for it.

$("#wrapper").on("click", "button", function() {
    // Do something
});

Useful resources:

- Performance comparison

- .on()

Problem

Original source