"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const isString_1 = __importDefault(require("vanillajs-helpers/isString"));
const ensureHTML_1 = __importDefault(require("./ensureHTML"));
const inDOM_1 = __importDefault(require("./inDOM"));
const isDOMElement_1 = __importDefault(require("./isDOMElement"));
/**
 * Inserts DOM element or plain HTML before a given DOM element
 *
 * @param elm - The DOM element to insert elements before
 * @param insertElm - DOM element or HTML (or selector) to insert
 * @return The inserted element
 */
function insertBefore(elm, insertElm) {
    if (!inDOM_1.default(elm) || isDOMElement_1.default(elm, 'html')) {
        return null;
    }
    if (isString_1.default(insertElm)) {
        elm.insertAdjacentHTML('beforebegin', ensureHTML_1.default(insertElm));
    }
    else {
        elm.insertAdjacentElement('beforebegin', insertElm);
    }
    return elm.previousElementSibling;
}
exports.default = insertBefore;