I have a textarea, On every Enter key pressed in textarea I want new line to be started with a bullet say (*). How to go about it ?
No jQuery please.
I can observe for the Enter key , after that !? Should I have to get the whole value of textarea and append * to it and again fill the textarea ?
You could do something like this:
<body>
<textarea id="txtArea" onkeypress="onTestChange();"></textarea>
<script>
function onTestChange() {
var key = window.event.keyCode;
// If the user has pressed enter
if (key === 13) {
document.getElementById("txtArea").value = document.getElementById("txtArea").value + "\n*";
return false;
}
else {
return true;
}
}
</script>
</body>
Although the new line character feed from pressing enter will still be there, but its a start to getting what you want.
You need to consider the case where the user presses enter in the middle of the text, not just at the end. I'd suggest detecting the enter key in the keyup event, as suggested, and use a regular expression to ensure the value is as you require:
<textarea id="t" rows="4" cols="80"></textarea>
<script type="text/javascript">
function formatTextArea(textArea) {
textArea.value = textArea.value.replace(/(^|\r\n|\n)([^*]|$)/g, "$1*$2");
}
window.onload = function() {
var textArea = document.getElementById("t");
textArea.onkeyup = function(evt) {
evt = evt || window.event;
if (evt.keyCode == 13) {
formatTextArea(this);
}
};
};
</script>