jodit/src/core/helpers/size/inner-width.ts

Jodit is awesome and usefully wysiwyg editor with filebrowser

/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Released under MIT see LICENSE.txt in the project root for license information.
 * Copyright (c) 2013-2020 Valeriy Chupurnov. All rights reserved. https://xdsoft.net
 */

export const innerWidth = (element: HTMLElement, win: Window): number => {
	const computedStyle: CSSStyleDeclaration = win.getComputedStyle(element);

	let elementWidth: number = element.clientWidth; // width with padding

	elementWidth -=
		parseFloat(computedStyle.paddingLeft || '0') +
		parseFloat(computedStyle.paddingRight || '0');

	return elementWidth;
};