![]() ![]() "D:" document.getElementById("onchange").value "\n" "B:" document.getElementById("onkeyup").value "\n" "A:" document.getElementById("onkeydown").value "\n" Var sel = document.getElementById("selectone") ĭocument.getElementById("eventlog").value = "" Here is the source code of the above interactive demonstration. The triggered action for the checkbox is the update of the textarea box at "F:" with either the word "checked" or "unchecked" depending on whether or not the checkbox is checked.Įach of the 4 events described in this article are recognized as events at different times. The triggered action for the radio button is the update of the textarea box at "E:" with the value of the checked item. As soon as the click happens, the event is triggered. This is especially useful for radio buttons and checkboxes. Onclick - The event is triggered when the field is clicked on. However, it will update only after the mouse is clicked somewhere outside the field. The triggered action is the update of the textarea box at "D:" with the content of the field. That's because so long as the field is in focus, the JavaScript doesn't know whether or not you are done typing. If used in a text field, the event will not be triggered until the mouse is clicked somewhere outside the field. The triggered action is the update of the textarea box at "C:" with the value of the selected item. As soon as a new selection is made, the event is triggered. This is especially useful for dropdown lists. Onchange - The event is triggered when a field has changed. The triggered action is the update of the textarea box at "B:" with the content of this field, including the character you just typed. The event is triggered after the character is typed into the form field. Onkeyup - As soon as the keyboard key is released, the event is triggered. Because the event is triggered before the character is typed, the character you are about to type is not included in the textarea box. The triggered action is the update of the textarea box at "A:" with the content of this field. The event is triggered before the character is typed into the form field.Įxample: onkeydown="AnEventHasOccurred()" Onkeydown - As soon as the keyboard key is pressed, the event is triggered. ![]()
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