jodit/src/modules/helpers/size/innerWidth.ts

Jodit is awesome and usefully wysiwyg editor with filebrowser

/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Licensed under GNU General Public License version 2 or later or a commercial license or MIT;
 * For GPL see LICENSE-GPL.txt in the project root for license information.
 * For MIT see LICENSE-MIT.txt in the project root for license information.
 * For commercial licenses see https://xdsoft.net/jodit/commercial/
 * Copyright (c) 2013-2019 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;
};