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Generate dynamically iframe and it’s content

Let’s say you want to generate dynamically iframe and instead of point to external source:

<script>
var iframe = document.createElement('iframe'),
    body = document.body || document.getElementsByTagName("body")[0];

iframe.src = "myiframecontent.html";
if (body) {
    body.appendChild(iframe);
}
</script>

you want to create dynamically content inside iframe. Sounds crazy, but… it’s possible. Partially. We can use data URI with content encoded using base64. By the way, you can use base64 encoding/decoding online t[......]

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Google Chrome and load insecure content

Google Chrome, by default, blocks insecure content on secure pages. It doesn’t allow you to mix HTTPS and HTTP connections. In developer console you’ll see:

chrome_insecure_content

However, you can allow Chrome to load insecure content. When you visit a secure page with insecure content, a shield icon will appear at the right edge of the omnibar.

chrome_insecure_content_option

Click on the shield icon, and then click Load unsafe script, and the insecure content will be loaded.

JavaScript fast reverse table rows

So, you want to fast revers rows in table. There is probably millions of possible solutions, but here I’ll preset my approach. Here is the code:

function reverseTableRows(tableId) {
    var table = document.getElementById(tableId),
        newTbody = document.createElement('tbody'),
        oldTbody = table.tBodies[0],
        rows = oldTbody.rows,
        i = rows.length - 1;

    while (i >= 0) {
        newTbody.appendChild(rows[i]);
        i -= 1;
    }
    oldTbody.parentNode.replaceChild(newTbody, oldTbody);
}

tableId pa[......]

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The direction of embedded text and how to verify what’s contains string

When you are working on internationalization of HTML inline element then you can use dir attribute or you may use special Unicode characters to achieve multiple embedded direction changes. However, sometimes there could be a bugs in your translated strings and when you use Unicode characters then debugging is little bit tricky. You may think that maybe your code is somewhere broken.

To illustrate the problem let’s say you have a string that is encoded in ar-SA (Arabic (Saudi Arabia)) language, but for some unknown reason one of character (pa[......]

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contenteditable and prevent from going to new line using ENTER key

Let’s say we have a simple div HTML element with attribute contenteditable. Sometimes we want to observe ENTER key and prevent cursor to go to new line when user hit ENTER key without SHIFT key. To do this you can use event onkeyup. See example how it works.

And? Yeah, the cursor is going to new line when you hit ENTER key. It’s relatively quick, but it’s still visible behavior. This is not exactly what we expecting. We do not what to move cursor to new line when user hit ENTER key without SHIFT key. Ok, why this happen?

It happens becau[......]

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How to override compatibility mode for intranet site when “Display intranet sites in Compatibility View” is checked?

Based on some research in internet I found that we can use HTML meta tag:

meta http-equiv="X-UA-Compatible" content="IE=edge"

to force IE to use highest supported document mode of the browser. Note: more about X-UA-Compatible you can find in MSDN documentation.

However, based on discussion in group Internet Explorer Dev Center looks like it’s better to send header X-UA-Compatible in server response. Cite:

The only way I found to override the “Display intranet sites in Compatibility View” setting was by setting the X-UA-Compatible host[......]

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VirtualBox: Installation failed! Error: System can not find the path specified.

I’ve just discovered today that I couldn’t install new version of VirtualBox due to problem with Installation failed! Error: System can not find the path specified.. After some investigation here is the solution:

  1. Open command line cmd
  2. Go to the directory where is your VirtualBox installation file. Mine installation file is (at the moment) VirtualBox-4.3.4-91027-Win.exe
  3. Run VirtualBox-4.3.4-91027-Win.exe -extract . It will extract files to directory C:\users\USERNAME\AppData\Local\Temp\VirtualBox or to your defined TEMP directory
  4. Above l[......]

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Modal windows – are they always necessary?

I do not want to write about “what is modal windows”, but focus on potential problems which may occur when you start using modal windows in some scenarios. More about modal windows you can find in article Techniques for creating modal windows.

Example:

Screenshot of My Library modal window example
Source: Screenshot of My Library modal window example

Before you create modal windows everywhere consider:

  • Provide “resize option. Otherwise customer will not be able to resize the modal window and probably some content may not be visible e.g. when user will set font size bigger.
  • [......]

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JS Tip: How to check if specified HTML element is supported by the browser

To check if browser support specified HTML element you can use:

function isHTMLElementSupported(elm) {
    return (Object.prototype.toString.call(document.createElement(elm)) !== '[object HTMLUnknownElement]');
};

Object.prototype.toString returns the value of the object’s internal [[Class]] property.

Every object has a toString() method that is automatically called when the object is to be represented as a text value or when an object is referred to in a manner in which a string is expected. By default, the toString() method is inherit[......]

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