/**
 * @license
 * Copyright Endlessjs. All Rights Reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 */
export function convertToBoolProperty(val) {
    if (typeof val === 'string') {
        val = val.toLowerCase().trim();
        return (val === 'true' || val === '');
    }
    return !!val;
}
export function getElementHeight(el) {
    /**
     *
     * TODO: Move helpers in separate common module.
     * TODO: Provide window through di token.
     * */
    const style = window.getComputedStyle(el);
    const marginTop = parseInt(style.getPropertyValue('margin-top'), 10);
    const marginBottom = parseInt(style.getPropertyValue('margin-bottom'), 10);
    return el.offsetHeight + marginTop + marginBottom;
}
export function firstChildNotComment(node) {
    const children = Array
        .from(node.childNodes)
        .filter((child) => child.nodeType !== Node.COMMENT_NODE);
    return children[0];
}
export function lastChildNotComment(node) {
    const children = Array
        .from(node.childNodes)
        .filter((child) => child.nodeType !== Node.COMMENT_NODE);
    return children[children.length - 1];
}
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