The text area tag defines a multi-line text input control. The size of a text area can be specified by the cols and rows attributes. By default, whenever we press “enter” or “shift+enter” it creates a new line in the text area. So, to only detect “shift+enter” and generate a new line from it we need to block “enter” from generating a new line and to redirect it to do something else like submitting.
Example 1: Check out the following Example for “enter” and “shift+enter” mechanism. So, here in the below code both “enter” and “shift+enter” do the same. So, all that has to be done is to either block the “enter” mechanism or redirecting it to do something else.
<!DOCTYPE html>
<html>
<body>
<center>
<h1 style="color:green;">GeeksforGeeks</h1>
<script>
function geeks(event) {
if (event.keyCode == 13 && event.shiftKey) {
document.getElementById("d").innerHTML = "Triggered enter+shift";
}
if (event.keyCode == 13 && !event.shiftKey) {
document.getElementById("d").innerHTML = "Triggered enter";
}
}
</script>
<h4>Press "enter" or "shift+enter" in the textarea, both does the same.</h4>
<textarea rows="8" cols="50" onkeypress="geeks(event)">
GeeksforGeeks A Computer science portal for geeks.
</textarea>
<p id="d" style="color:red"></p>
</center>
</body>
</html>
|
Output:
Example 2: In the below code, we created a function(submitForm()) to submit the form which just contains a line, because placing this document.geek.submit() under event.preventDefault(), document.geek.submit() will overrides the event.preventDefault() and never blocks the “enter” from creating a line.
<!DOCTYPE html>
<html>
<head>
<script>
function press(event) {
if (event.keyCode == 13 && !event.shiftKey) {
event.preventDefault();
submitForm();
return true;
}
function submitForm() {
document.geek.submit();
}
}
</script>
</head>
<body>
<center>
<h1 style="color:green">GeeksforGeeks</h1>
<h4>
Press "enter" to submit and "shift+enter" to generate a new line.
</h4>
<form action="submit.html" name="geek">
<textarea rows="7" cols="30" onkeypress="press(event)"></textarea>
</form>
</center>
</body>
</html>
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HTML in submit.html:
<!DOCTYPE html>
<html>
<body>
<h2 style="color:red">List Submitted.</h2>
</body>
</html>
|
Output:
