JavaScript: Modify paragraph text style through javascript code using button

Last update on May 30 2022 10:00:22 (UTC/GMT +8 hours)

JavaScript DOM: Exercise-1 with Solution

Here is a sample html file with a submit button. Now modify the style of the paragraph text through javascript code.

Sample HTML file:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS DOM paragraph style</title>
</head> 
<body>
<p id ='text'>JavaScript Exercises - w3resource</p> 
<div>
<button id="jsstyle"
onclick="js_style()">Style</button>
</div>
</body>
</html>

Tips: Clicking on the button the font, font size, and color of the paragraph text will be changed.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS DOM paragraph style</title>
</head> 
<body>
<p id ='text'>JavaScript Exercises - w3resource</p> 
<div>
<button id="jsstyle"
onclick="js_style()">Style</button>
</div>
</body>
</html>

JavaScript Code:

function js_style() 
{
//font styles added by JS:
 text.style.fontSize = "14pt";
 text.style.fontFamily = "Comic Sans MS";
 text.style.color = "green";
}

Sample Output:

Flowchart:

Live Demo:

See the Pen javascript-dom-exercise-1 by w3resource (@w3resource) on CodePen.

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Previous: JavaScript DOM Exercises
Next: Write a JavaScript function to get the values of First and Last name of the following form.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04