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JavaScript: Print the contents of the current window

JavaScript Basic: Exercise-2 with Solution

Write a JavaScript function to print the contents of the current window.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Print the current page.</title>
</head>
<body>
<p></p>
<p>Click the button to print the current page.</p>
<button onclick="print_current_page()">Print this page</button>
</body>
</html>

JavaScript Code:

function print_current_page()
{
window.print();
}

Sample Output:

Click the button to print the current page.

Explanation:

window.print(): The window object represents a window containing a DOM document; the document property points to the DOM document loaded in that window, window.print() is used to open the Print Dialog to print the current document.

ES6 Version:

function print_current_page()
{
window.print();
}

Live Demo:

See the Pen JavaScript current day and time - basic-ex-2 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Checks if the provided argument is array-like (i.e. is iterable)

Example:

const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'function';
console.log(isArrayLike(document.querySelectorAll('.className'))); // true
console.log(isArrayLike('abc')); // true
console.log(isArrayLike(null)); // false

Output:

true
true
false