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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

Splits values into two groups according to a predicate function, which specifies which group an element in the input collection belongs to. If the predicate function returns a truthy value, the collection element belongs to the first group; otherwise, it belongs to the second group.

Example:

const tips_bifurcateBy = (arr, fn) =>
  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]);
console.log(tips_bifurcateBy(['little', 'bo', 'peep', 'foo' ], x => x[0] === 'b'));

Output:

[["bo"], ["little", "peep", "foo"]]