Piotr Elmanowski

Piotr Elmanowski

Piotr Elmanowski

CEO and web developer at Fronteos.com

Focused on web technologies, front-end above all. Managing Fronteos company – the best quality and pixel-perfect responsive websites provider.

MySQL – change next auto_increment value

2 Nov, 2018 | Piotr Elmanowski

Check this situation – you want to import to existing table already prepared data in csv in eg. PhpMyAdmin, and then you can see MySQL error: #1062 – Duplicate entry […]

MySQL – create new table, add new column, change and delete existing column

31 Oct, 2018 | Piotr Elmanowski

As front-end developers we can’t stay only in HTML/CSS/JS area. We need to do from time to time operation in other IT areas like in back-end, server side or in […]

Wrap long word (text) in table cell

7 Oct, 2018 | Piotr Elmanowski

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Tables in HTML are a quite strange elements. You can set some CSS rules, linke width for columns, and somethimes – nothing happens. This happens especially when in table cell […]

CSS: Center text/image/div in middle of parent div (container)

22 Aug, 2018 | Piotr Elmanowski

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It is a common situation, that you want to put some element (like text, image or div) in the center (horizontally and vertically) of parent div (container). Setting some element […]

CSS: Custom input file in Internet Explorer, Chrome and Firefox

20 May, 2018 | Piotr Elmanowski

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Input type file is always a coders nightmare. You can’t style it using common methods coming from CSS, because there are no options to style it using CSS input type […]

Check cookies, local and session storage in IE11, Edge, Chrome, Opera and Firefox

14 May, 2018 | Piotr Elmanowski

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In all browsers click F12 on keybord, and open developers tools. Then click like on images below to show cookies and session and local storage. Check cookies in Internet Explorer […]

CSS: ul custom bullet style with image

3 May, 2018 | Piotr Elmanowski

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When we code CSS for website or web app, quite often we need to provide custom look of bullets in UL list. Standard CSS rules give us not so many […]

CSS: Custom checkbox style with image

22 Feb, 2017 | Piotr Elmanowski

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As everyone knows, it is impossible to style input checkbox in CSS. But there is very easy workaround for that, of course, without JavaScript. You must create input checkbox with […]

CSS: Show hide div without JavaScript

22 Feb, 2017 | Piotr Elmanowski

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Sometimes you are not able to use JavaScript but you want to show and hide some div. It is possible, and very easy! You must create 3 elements: input – […]

JavaScript: create, update and remove cookies

1 Feb, 2017 | Piotr Elmanowski

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If we want to create, update or remove cookies in JavaScript we must do a few very simple operations like I described below. Step 1 – prepare an expiration date […]