text-field-edit

text-field-edit

Insert text in a <textarea> and <input> (supports Firefox and Undo, where possible)

You should use this instead of setting the field.value directly because:

• it doesn't break the undo history (in supported browsers)
• it fires an input event (with event.inputType === 'insertText')
• it's the most efficient way of adding/replacing selected text in a field
• it's cross-browser (modern browsers)

It uses document.execCommand('insertText') in Chrome (which has Undo support) and it replicates its behavior in Firefox (without Undo support until this bug is solved).

If you need IE support, use insert-text-at-cursor.

Install

You can just download the standalone bundle

Or use npm:

npm install text-field-edit

// This module is only offered as a ES Module
import * as textFieldEdit from 'text-field-edit';

Usage

Insert text at the cursor, replacing any possible selected text, acting like a paste would:

const input = document.querySelector('input');
const button = document.querySelector('.js-add-signature');
button.addEventListener(event => {
	textFieldEdit.insert(input, 'Made by 🐝 with pollen.');
});

This will act like field.value = 'New value' but with undo support and by firing the input event:

const textarea = document.querySelector('textarea');
const resetButton = document.querySelector('.js-markdown-reset-field');
resetButton.addEventListener(event => {
	textFieldEdit.set(textarea, 'New value');
});

API

textFieldEdit.insert(field, text)

Inserts text at the cursor’s position, replacing any selection.

const field = document.querySelector('input[type="text"]');
textFieldEdit.insert(field, '🥳');
// Changes field's value from 'Party|' to 'Party🥳|' (where | is the cursor)

field

Type: HTMLTextAreaElement | HTMLInputElement

text

Type: string

The text to insert at the cursor's position.

textFieldEdit.set(field, text)

Replaces the entire content, equivalent to field.value = 'New text!' but with undo support and by firing the input event:

const textarea = document.querySelector('textarea');
textFieldEdit.set(textarea, 'New text!');

field

Type: HTMLTextAreaElement | HTMLInputElement

text

Type: string

The new value that the field will have.

textFieldEdit.wrapSelection(field, wrappingText, endWrappingText?)

Adds the wrappingText before and after field’s selection (or cursor). If endWrappingText is provided, it will be used instead of wrappingText at on the right.

const field = document.querySelector('textarea');
textFieldEdit.wrapSelection(field, '**');
// Changes the field's value from 'I |love| gudeg' to 'I **|love|** gudeg' (where | marks the selected text)

const field = document.querySelector('textarea');
textFieldEdit.wrapSelection(field, '(', ')');
// Changes the field's value from '|almost| cool' to '(|almost|) cool' (where | marks the selected text)

textFieldEdit.getSelection(field)

Utility method to get the selected text in a field or an empty string if nothing is selected.

const field = document.querySelector('textarea');
textFieldEdit.getSelection(field);
// => 'almost'
// If the field's value is '|almost| cool' (where | marks the selected text)

field

Type: HTMLTextAreaElement | HTMLInputElement

Related

• indent-textarea - Add editor-like tab-to-indent functionality to <textarea>, in a few bytes. Uses this module.
• fit-textarea - Automatically expand a <textarea> to fit its content, in a few bytes.
• Refined GitHub - Uses this module.