Issue #290 (change vs. input, Media, Git/CLI, Site Builders)
Most likely you're aware that the change event is different from the input event. For one thing, the change event has been around much longer, at least since the DOM 2 spec, while input was a later addition in the HTML5 DOM spec.
One major difference in the way they function is the fact that the change event will generally only trigger on form elements, while input works on form elements and on elements with the contenteditable attribute set to true. The input event will also fire on elements that are editable using document.designMode = 'on'.
I've set up a CodePen demo with various elements on the page, that prints a message in the console every time an element is changed and the input event fires. Try typing some text in the various form fields or adjusting the checkbox or radio button. You can also edit a div on the page and an iframe (which doesn't have a source in it, but it doesn't matter, you can still edit its child document).
And here's another CodePen demo that has the same elements but this time looks for change events.
Notice two key differences:
- As mentioned, the contenteditable and designMode elements do not trigger the change event but both will trigger input
- The change event fires only after an element's content has been committed. In the case of the checkbox and radio button, it's the same as the input event, but the text field elements don't trigger the change event until you move focus away from the field.
If you want to test the iframe example with a real page embedded, here's a simple example
(open the console to see the event message).
Just a couple of subtle differences to keep in mind if you were considering using either of these events.
Now on to this week's tools!
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A Tweet for Thought
Interesting thread from Sarah Mei on communication in your code base.
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