codeup-web-exercises/dom-query-js.html at main · midoostar1/codeup-web-exercises · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>DOM: Query and Modify</title>
</head>
<body>

<h1 id="main-header">Hello World!</h1>
<ul>
    <li data-dbid="1">Item 1</li>
    <li data-dbid="2">Item 2</li>
    <li data-dbid="3">Item 3</li>
    <li data-dbid="4">Item 4</li>
    <li data-dbid="5">Item 5</li>
</ul>
<h2 id="sub-header">Hello Again.</h2>
<p class="sub-paragraph">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
    eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim
    ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut
    aliquip ex ea commodo consequat. Duis aute irure dolor in
    reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
    pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
    culpa qui officia deserunt mollit anim id est laborum.
</p>
<button id="btn1">change main header</button>
<button id="btn2">change sub header color</button>
<button id="btn3">change li colors</button>
<button id="btn4">subParagraphs</button>

<script>
    (function() {
        "use strict";
        // TODO: Uncomment next line and get the main header element by id
        //  var mainHeader = document.getElementById("main-header") ;

        // TODO: Set inner html of mainHeader to "JavaScript is Cool"
    // mainHeader.innerHTML = "JavaScript is Cool"

        var changeMainHeader = function (){
            var  mainHeader = document.getElementById("main-header")
            mainHeader.innerHTML = "JavaScript is Cool"

        }
        document.getElementById("btn1").addEventListener("click", changeMainHeader)

        // TODO: Uncomment the next line and get the sub header element by id
        // var subHeader = document.getElementById("sub-header");

        // TODO: Set the text color of subHeader to blue
    // subHeader.setAttribute('style', "color:blue")

    var changeSubHeader = function (){
         var subHeader = document.getElementById("sub-header")
            subHeader.setAttribute('style', "color:blue")
}
document.getElementById("btn2").addEventListener("click",changeSubHeader )

        // TODO: Uncomment the next line and get all list items
        //  var listItems = document.getElementsByTagName("li");

        // TODO: Set text color on every other list item to grey
   // for(var i=0; i<listItems.length;i++){
   //    if(i%2===0) {
   //        listItems[i].style.color = "grey"
   //    }
   //     if(listItems[i].getAttribute("data-dbid") === "1"){
   //        listItems[i].style.color = "blue"
   //    }
   // }
        // TODO: Set text color of li with dbid = 1 to blue


      var changeLiColors =  function() {
           var listItems = document.getElementsByTagName("li")
           for (var i = 0; i < listItems.length; i++) {
               if (i % 2 === 0) {
                   listItems[i].style.color = "grey"
               }
               if(listItems[i].getAttribute("data-dbid") === "1"){
                   listItems[i].style.color = "blue"
               }
           }
       }
    document.getElementById("btn3").addEventListener("click", changeLiColors)


// listItems[0].setAttribute("style", "color:blue")
        // TODO: Uncomment the next line and get all elements with class name sub-paragraph
        //  var subParagraphs = document.getElementsByClassName("sub-paragraph");
    // subParagraphs[0].innerHTML = "Mission Accomplished!"

        var changeSubParagraphs = function (){
            var subParagraphs = document.getElementsByClassName("sub-paragraph")
            subParagraphs[0].innerHTML = "Mission Accomplished!"
        }
document.getElementById("btn4").addEventListener("click", changeSubParagraphs)

        // TODO: Change the text in the first sub paragraph to "Mission Accomplished!"


    })();
</script>
</body>
</html>