html, and an
onclickattribute is added.
onclickis not the only method, try also
onmouseover, and more. See more here
html, but is made active thanks to
idand an event listener is setup:
.on("input", changeSize ). Each type the input of the button changes, the
changeSizefunction is triggered.
inputto listen to a numeric input button. But listen to
changefor a dropdown button. This is a bit tricky and a small example of each type is provided in the application part of this document.
thismagick variable to recover the option that has been chosen before calling the
This example shows how to create a radio button and an event listener to it. This event listener is able to figure out when the radio button state changes. Then, the trickiest part is to recover the current value of the radio button.
This example shows how to create a slider that controls circle size. An event listener constantly checks if the slider value is modified thanks to an
on("change",..) statement. Recovering the slider value is simple using
Other examples involving sliders
Dropdown to select group
A dropdown button allows to switch from one group to another with smooth transition.
Note: each group is in a different column in input