How Can I Detect 'Shift Enter' to Insert a New Line in a Textarea Instead of Submitting a Form?

Detecting "Shift Enter" and Inserting a New Line in Textarea

By default, pressing the "Enter" key inside a textarea submits the form. However, you want to retain this functionality while also allowing users to create a new line by pressing the "Shift" "Enter" key combination. Here's how to achieve this in JavaScript:

If you control the script that makes "Enter" submit the form, simply modify the code to check if the "Shift" key is not pressed. For instance, change this:

if (evt.keyCode == 13) {
    form.submit();
}

... to this:

if (evt.keyCode == 13 && !evt.shiftKey) {
    form.submit();
}

However, if you don't have access to the original code, you can use the following script to achieve the desired behavior, even when the cursor is not at the end of the text:

function handleEnter(evt) {
    if (evt.keyCode == 13 && evt.shiftKey) {
        if (evt.type == "keypress") {
            pasteIntoInput(this, "\n");
        }
        evt.preventDefault();
    }
}

// Handle both keydown and keypress for Opera as it suppresses default key action in keypress
$("#your_textarea_id").keydown(handleEnter).keypress(handleEnter);

This script checks for the "Shift" "Enter" key combination. When detected, it inserts a newline character ("n") into the textarea using the pasteIntoInput function and prevents the default form submission.

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