function init() {
    changeActiveTools('xmlTool', 'XML');
}

/**
 * Function that updates list of tools depending on chosen category
 * 
 * @function
 * @name changeActiveTools
 * @kind function
 * @param {any} activeClass class of elements that have to be shown
 * @param {any} activeCategoryButton class of category button that has to be active
 */
function changeActiveTools(activeClass, activeCategoryButton) {
    let tools = document.getElementById("toolList").children
    
    for (i = 0; i < tools.length; i++) {
        if (tools[i].classList.contains(activeClass)) {
            tools[i].style.display = "block";
        }
        else {
            tools[i].style.display = "none";
        }
    }

    let categories = document.getElementById("menu").children

    for (i = 0; i < categories.length; i++) {
        if (categories[i].innerText == activeCategoryButton) {
            categories[i].classList.add("active")
        }
        else {
            categories[i].classList.remove("active")
        }
    }
}