Question

The code below modifies the CSS style on button click. Give the output of the code...

The code below modifies the CSS style on button click. Give the output of
the code and modify the code such that background color of title should
also be modified

.
<!DOCTYPE html>
<html lang="en">
<head>
<title>JavaScript and HTML</title>
<meta charset="utf-8"/>
<style>
h1 {
color:blue;
background-color:lightGreen;
border:12px solid green;
padding: 5px;
border-radius: 15px;
text-align: center;
}
p, h1 {
}
}
</style>
<script>
function changeTitleCSSStyle() {
var title = document.querySelector("#mainTitle");
title.style.color = 'black';
title.style.border = "5px dashed red";
}
</script>
</head>
<body>
<h1 id="mainTitle">My home page</h1>
<button onclick="changeTitleCSSStyle();">Click me to change the CSS
colors of the title of the page</button>
</body>
</html>

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Answer #1

Output of your Program

after Clicking on Button

Changes Done in code to change background color of Title

.
<!DOCTYPE html>
<html lang="en">
<head>
<title>JavaScript and HTML</title>
<meta charset="utf-8"/>
<style>
h1 {
color:blue;
background-color:lightGreen;
border:12px solid green;
padding: 5px;
border-radius: 15px;
text-align: center;
}
p, h1 {
}
}
</style>
<script>
function changeTitleCSSStyle()
{
var title = document.querySelector("#mainTitle");
title.style.color = 'black';
title.style.border = "5px dashed red";
title.style.backgroundColor='pink';
}
</script>
</head>
<body>
<h1 id="mainTitle">My home page</h1>
<button onclick="changeTitleCSSStyle();">Click me to change the CSS
colors of the title of the page</button>
</body>
</html>

Note: Changes Highlighted in BOLD(Set the background color to pink)

Screen

Output after Changes:

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