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dom-query-js.html
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dom-query-js.html
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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>
<button id="btn1">Click to Change Header!</button>
<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>
<button id="btn3">Clicky to Change the List!</button>
<h2 id="sub-header">Hello Again.</h2>
<button id="btn2">Click to Change Sub Header!</button>
<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="btn4">Click to Translate!</button>
<script>
(function() {
"use strict";
var btn1 = document.getElementById("btn1");
var btn2 = document.getElementById("btn2");
var btn3 = document.getElementById("btn3");
var btn4 = document.getElementById("btn4");
// TODO: Uncomment next line and get the main header element by id
// TODO: Set inner html of mainHeader to "JavaScript is Cool"
var changeMainHeader = btn1.addEventListener("click", function (event) {
var mainHeader = document.getElementById("main-header");
mainHeader.innerHTML = "JavaScript is Cool";
})
// TODO: Uncomment the next line and get the sub header element by id
// TODO: Set the text color of subHeader to blue
var changeSubHeader = btn2.addEventListener("click", function (event) {
var subHeader = document.getElementById("sub-header");
subHeader.style.color = "blue";
})
// TODO: Uncomment the next line and get all list items
// TODO: Set text color on every other list item to grey
// TODO: Set text color of li with dbid = 1 to blue
var changeList = btn3.addEventListener("click", function (event) {
var listItems = document.getElementsByTagName('li');
for (var i = 0 ; i < listItems.length ; i+=2 ) {
var firstListItem = listItems[i].getAttribute("data-dbid");
if (firstListItem === "1") {
listItems[i].style.color = "blue";
} else {
listItems[i].style.color = "grey";
}
}
})
// TODO: Uncomment the next line and get all elements with class name sub-paragraph
// TODO: Change the text in the first sub paragraph to "Mission Accomplished!"
var changeParagraph = btn4.addEventListener("click", function (event) {
var subParagraphs = document.getElementsByClassName("sub-paragraph");
subParagraphs[0].innerText = "Mission Accomplished";
})
})();
</script>
</body>
</html>