diff --git a/01/app.js b/01/app.js
index 1c9992e..ab6e587 100644
--- a/01/app.js
+++ b/01/app.js
@@ -1 +1,5 @@
-console.log('DOM');
\ No newline at end of file
+console.log('DOM');
+
+const commentsItem = document.querySelector('.comments__item ', '.comments__item--newest')
+const DataInfoElements = commentsItem.querySelectorAll('[data-info]')
+console.log(`znaleziono ${DataInfoElements.length} elementów wewnątrz elementu z tagiem ${commentsItem.nodeName}`)
\ No newline at end of file
diff --git a/02/app.js b/02/app.js
index 1c9992e..3fb537e 100644
--- a/02/app.js
+++ b/02/app.js
@@ -1 +1,7 @@
-console.log('DOM');
\ No newline at end of file
+console.log('DOM');
+const allLinks = document.querySelectorAll("[data-url]")
+console.log(allLinks)
+allLinks.forEach(link => {
+    const value = link.dataset.url
+    link.setAttribute('href', value)
+})
\ No newline at end of file
diff --git a/03/app.js b/03/app.js
index c299ca3..e049fda 100644
--- a/03/app.js
+++ b/03/app.js
@@ -11,4 +11,33 @@ const buttonSettings = {
         color: '#444'
     },
     text: 'Click me!',
-}
\ No newline at end of file
+}
+
+const newBtn = document.createElement('button')
+for(const key  in buttonSettings) {
+        const value = buttonSettings[key]
+        if(typeof value === 'object' && value !== null ) {
+            if(key == 'attr') {
+                for(const property in value) {
+                    newBtn.setAttribute(property, value[property])
+                    console.log(`${property}: ${value[property]}`)
+    
+                }
+            }
+            if(key == 'css') {
+                for(const property in value) {
+                    newBtn.style[property] = value[property]
+                    console.log(`${property}: ${value[property]}`)
+                }
+            }
+            
+        } else {
+            console.log(`${key}: ${value}`)
+            newBtn.innerText = value
+        }
+}
+
+const parent = document.querySelector('.parent-for-button')
+console.log(parent)
+parent.appendChild(newBtn)
+
diff --git a/04/app.js b/04/app.js
index e6411e4..34b6ce5 100644
--- a/04/app.js
+++ b/04/app.js
@@ -2,7 +2,30 @@ console.log('DOM');
 
 // struktura do wykorzystania w pętli
 const menuItems = [
-    {text: 'start', url: '/'},
-    {text: 'galeria', url: '/gallery'},
-    {text: 'kontakt', url: '/contact'},
-];
\ No newline at end of file
+    {
+        text: 'start', 
+        url: '/'
+    },
+    {
+        text: 'galeria', 
+        url: '/gallery'
+    },
+    {
+        text: 'kontakt', 
+        url: '/contact'
+    },
+];
+
+const ulList = document.createElement('ul')
+menuItems.forEach(item => {
+    newLi = document.createElement('li')
+    newA = document.createElement('a')
+    newA.innerText = item.text
+    newA.setAttribute('href',item.url)
+    
+    newLi.appendChild(newA)
+    ulList.appendChild(newLi)
+    
+})
+const nav = document.querySelector('nav')
+nav.appendChild(ulList)
\ No newline at end of file
diff --git a/05/app.js b/05/app.js
index 39abe5d..1f20346 100644
--- a/05/app.js
+++ b/05/app.js
@@ -1,3 +1,34 @@
 console.log('DOM');
 
 const curr = document.querySelector('.js-curr');
+const parent = curr.parentElement
+const newBtn = document.createElement('button')
+newBtn.innerText = "Usuń z koszyka"
+parent.appendChild(newBtn)
+
+const children = Array.from(parent.children)
+
+const sliblings = children.filter(child => child !== curr)
+
+console.log(sliblings)
+console.log(sliblings)
+for(let i = 0; i < sliblings.length; i++){
+    sliblings[i].classList.toggle('sliblings')
+}
+
+parent.nextElementSibling.setAttribute('title','nextElementSlibling')
+
+const lastArticle = parent.parentElement.lastElementChild
+const pElement = document.createElement('p')
+pElement.innerText = 'new paragraph'
+const articlebutton = lastArticle.querySelector('button')
+lastArticle.insertBefore(pElement,articlebutton)
+
+const newArticle = document.createElement('article')
+newArticle.classList.add('articles__item', 'article')
+newArticle.innerHTML = 
+    `<h1 class="article__title">JS - Elementy DOM2</h1>
+    <p class="article__description">Lorem ipsum dolor sit amet consectetur adipisicing elit. Consequatur quo quibusdam, nemo neque consequuntur pariatur totam? Facere quaerat molestias hic.</p>
+    <button class="article__btn js-curr">Kupuję!</button>`
+
+parent.parentElement.insertBefore(newArticle,parent)
\ No newline at end of file