Of all these I&#39;d choose `data`: it is defined for the nodes implementing [**CharacterData**][1] interface ([**Text**][2] and [**Comment**][3] ones) only. Trying to access this property for the others gives `undefined`.

[nodeValue][4] is essentially the same as `data` for text nodes, but is actually defined for attribute and comment nodes as well. And I usually want my programs to fail early. )

[textContent][5] is, for me, something completely different, as it represents the text content of a node _and its descendants_. This, along with [wholeText][6], perhaps should be used more to collect texts from more complex structures than a single text node.

Said all that, `textContent` and `wholeText` were defined in DOM Level 3 (= more modern).


  [1]: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-FF21A306
  [2]: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-1312295772
  [3]: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-1728279322
  [4]: https://developer.mozilla.org/en-US/docs/DOM/Node.nodeValue
  [5]: https://developer.mozilla.org/en-US/docs/DOM/Node.textContent
  [6]: https://developer.mozilla.org/en-US/docs/DOM/Text.wholeText

When I compile and run this code:

    public class Testing {
        public static void main(String... args) {
	        Object obj = null;
	        if (obj instanceof Object) {
		        System.out.println(&quot;returned true&quot;); 
    		} else {
    			System.out.println(&quot;returned false&quot;); 
    		}
    		System.out.println(&quot; &quot; + obj instanceof Object);
	    }
    }

I get this on the command line:

    C:\Users\xxxxxx\Desktop&gt;java Testing
    returned false
    true

Shouldn&#39;t &quot;null instanceof someType&quot; always return false?

Java - null instanceof Object evaluates to both true and false

I have numpy array with this shape: (33,10). When I plot contour I get ugly image like this:
![enter image description here][1] 

  [1]: http://i.stack.imgur.com/kqvFU.png

while `contour()` doesn&#39;t seem to have any argument about smoothing or some sort of interpolation feature.

I somehow expected that tool which offers contour plot should offer smoothing too.  
Is there straight forward way to do it in MPL?

How to smooth matplotlib contour plot?

&gt; **Possible Duplicate:**  
&gt; [How to retrieve the text of a DOM Text node?](https://stackoverflow.com/questions/7690627/how-to-retrieve-the-text-of-a-dom-text-node)  

&lt;!-- End of automatically inserted text --&gt;

In my experiments to handle DOM mutation observers I&#39;ve noticed that when the `target` is a text node there are four fields all containing the new text of the node.

- `data`
- `nodeValue`
- `textContent`
- `wholeText`

Is there a &quot;best practice&quot; for which of these fields I should use?

Are some just for compatibility with other browsers or older DOM standards? Does it make a difference whether I&#39;m reading vs modifying the text? If one is best what is the purpose of the others?

When working with text nodes should I use the &quot;data&quot;, &quot;nodeValue&quot;, &quot;textContent&quot; or &quot;wholeText&quot; field?

> Possible Duplicate: 
> <a href="https://stackoverflow.com/questions/7690627/how-to-retrieve-the-text-of-a-dom-text-node" target="_blank" rel="noopener noreferrer">How to retrieve the text of a DOM Text node?</a>

In my experiments to handle DOM mutation observers I've noticed that when the <code>target</code> is a text node there are four fields all containing the new text of the node.
<ul>
<li><code>data</code></li>
<li><code>nodeValue</code></li>
<li><code>textContent</code></li>
<li><code>wholeText</code></li>
</ul>
Is there a "best practice" for which of these fields I should use?
Are some just for compatibility with other browsers or older DOM standards? Does it make a difference whether I'm reading vs modifying the text? If one is best what is the purpose of the others?

I have routes set in AngularJS like this:

    $routeProvider
        .when(&#39;/dashboard&#39;, {templateUrl:&#39;partials/dashboard&#39;, controller:widgetsController})
        .when(&#39;/lab&#39;, {templateUrl:&#39;partials/lab&#39;, controller:widgetsController})

I have some links on the topbar styled as tabs. How can I add &#39;active&#39; class to a tab depending on current template or url?

Set active tab style with AngularJS

How do I remove the default yellow box border of Selected input and select fields in chrome or any browser like safari?
I want to customize input with custom box shadow css. How do I remove the default browser select border?

How to remove default chrome style for select Input?

I am trying to choose the right technology to use for updating a project that basically renders thousands of points in a zoomable, pannable graph. The current implementation, using Protovis, is underperformant. Check it out here:

http://www.planethunters.org/classify

There are about 2000 points when fully zoomed out. Try using the handles on the bottom to zoom in a bit, and drag it to pan around. You will see that it is quite choppy and your CPU usage probably goes up to 100% on one core unless you have a really fast computer. Each change to the focus area calls a redraw to protovis which is pretty darn slow and is worse with more points drawn.

I would like to make some updates to the interface as well as change the underlying visualization technology to be more responsive with animation and interaction. From the following article, it seems like the choice is between another SVG-based library, or a canvas-based one:

http://www.sitepoint.com/how-to-choose-between-canvas-and-svg/

[d3.js][1], which grew out of Protovis, is SVG-based and is [supposed to be better at rendering animations][2]. However, I&#39;m dubious as to how much better and what its performance ceiling is. For that reason, I&#39;m also considering a more complete overhaul using a canvas-based library like [KineticJS][3]. However, before I get too far into using one approach or another, I&#39;d like to hear from someone who has done a similar web application with this much data and get their opinion.

The most important thing is performance, with a secondary focus on ease of adding other interaction features and programming the animation. There will probably be no more than 2000 points at once, with those small error bars on each one. **Zooming in, out, and panning around need to be smooth.** If the most recent SVG libraries are decent at this, then perhaps the ease of using d3 will outweigh the increased setup for KineticJS, etc. But if there is a huge performance advantage to using a canvas, especially for people with slower computers, then I would definitely prefer to go that way.

Example of app made by the NYTimes that uses SVG, but still animates acceptably smoothly:
http://www.nytimes.com/interactive/2012/05/17/business/dealbook/how-the-facebook-offering-compares.html . If I can get that performance and not have to write my own canvas drawing code, I would probably go for SVG.

I noticed that some users have used a hybrid of [d3.js manipulation combined with canvas rendering][4]. However, I can&#39;t find much documentation about this online or get in contact with the OP of that post. If anyone has any experience doing this kind of DOM-to-Canvas ([demo][5], [code][6]) implementation, I would like to hear from you as well. It seems to be a good hybrid of being able to manipulate data and having custom control over how to render it (and therefore performance), but I&#39;m wondering if having to load everything into the DOM is still going to slow things down.

I know that there are some existing questions that are similar to this one, but none of them exactly ask the same thing. Thanks for your help.

**Follow-up**: the implementation I ended up using is at https://github.com/zooniverse/LightCurves

  [1]: http://d3js.org/
  [2]: http://mbostock.github.com/d3/tutorial/protovis.html
  [3]: http://www.kineticjs.com/
  [4]: https://stackoverflow.com/questions/12098286/canvas-tooltip-to-appear-outside-canvas
  [5]: http://bl.ocks.org/1276463
  [6]: https://gist.github.com/1276463

Fast and responsive interactive charts/graphs: SVG, Canvas, other?

The HTML spec allows for periods (.) in an id:

`&lt;img id=&quot;some.id&quot; /&gt;`

However, using a CSS ID selector rule will _not_ match correctly:

`#some.id { color: #f00; }`

The CSS spec for [ID Selectors][1] does not mention this case. So I assume it is using the combination of a tag name and [class selector][2]? For example, a CSS rule of `a.className` would apply to all anchor tags (`&lt;a&gt;`) with a class name of `className`, like `&lt;a class=&quot;className&quot;&gt;&lt;/a&gt;`.

Is it possible to have an external CSS file rule that references an HTML element by its id that has a period in it?

I expect not since the CSS spec specifies that a CSS &quot;[identifier][3]&quot; does not include the period as a valid character. So is this a fundamental mismatch between HTML and CSS specs? Is my only alternative to use a different type of CSS selection? Can anyone smarter than I confirm or deny this?

(I would remove the period from the HTML id attribute to simplify things, but it is a system-generated id, so I don&#39;t have the ability to change it in this case.)


  [1]: http://www.w3.org/TR/CSS2/selector.html#id-selectors
  [2]: http://www.w3.org/TR/CSS2/selector.html#class-html
  [3]: http://www.w3.org/TR/CSS2/syndata.html#value-def-identifier

CSS selector with period in ID

    &lt;div id=&quot;a&quot;&gt;This is some
       &lt;div id=&quot;b&quot;&gt;text&lt;/div&gt;
    &lt;/div&gt;

Getting &quot;This is some&quot; is non-trivial.  For instance, this returns &quot;This is some text&quot;:

    driver.find_element_by_id(&#39;a&#39;).text

How does one, in a general way, get the text of a specific element without including the text of it&#39;s children?

(I&#39;m providing an answer below but will leave the question open in case someone can come up with a less hideous solution).

How to get text of an element in Selenium WebDriver, without including child element text?

I have an Angular template in the DOM.  When my controller gets new data from a service, it updates the model in the $scope, and re-renders the template.  All good so far.

The issue is that I need to also do some extra work after the template has been re-rendered and is in the DOM (in this case a jQuery plugin).

It seems like there should be an event to listen to, such as AfterRender, but I can&#39;t find any such thing.  Maybe a directive would be a way to go, but it seemed to fire too early as well.

Here is a jsFiddle outlining my problem: [Fiddle-AngularIssue](http://jsfiddle.net/gorebash/uNREn/3/)



**== UPDATE ==**

Based on helpful comments, I&#39;ve accordingly switched to a directive to handle DOM manipulation, and implemented a model $watch inside the directive.  However, I still am having the same base issue; the code inside of the $watch event fires before the template has been compiled and inserted into the DOM, therefore, the jquery plugin is always evaluating an empty table.

Interestingly, if I remove the async call the whole thing works fine, so that&#39;s a step in the right direction.

Here is my updated Fiddle to reflect these changes: http://jsfiddle.net/uNREn/12/


AngularJS: How to run additional code after AngularJS has rendered a template?

PHP DOMnode objects contain a [textContent](http://at.php.net/manual/en/class.domnode.php#domnode.props.textcontent) and [nodeValue](http://at.php.net/manual/en/class.domnode.php#domnode.props.nodevalue) attributes which both seem to be the innerHTML of the node.

&gt; nodeValue: The value of this node, depending on its type
&gt;
&gt; textContent: This attribute returns the text content of this node and its descendants.

What is the difference between these two properties? When is it proper to use one instead of the other?


PHP DOM textContent vs nodeValue?

(Maybe) I just solved a my problem ([How to update front-end content after that a form is successfully submitted from a dialog window?][1]) by &quot;storing&quot; / &quot;saving&quot; a variable in the JavaScript `window` object. However, since I am newbie in JavaScript matters, *I have some doubts if storing / saving a variable in the JavaScript `window` object is a &quot;common&quot; / &quot;proper&quot; way to use that object*. Is it?

For example, using the following code

    $(&#39;.trigger&#39;).click(function() {
      window.trigger_link = this;
    });

is advisable?


  [1]: https://stackoverflow.com/questions/12388987/how-to-update-front-end-content-after-that-a-form-is-successfully-submitted-from

Storing a variable in the JavaScript &#39;window&#39; object is a proper way to use that object?

If a DOM Element is removed, are its listeners removed from memory too?

If a DOM Element is removed, are its listeners also removed from memory?

I have a question on a big # of dom elmenets and performance.

Let&#39;s say I have 6000 dom elements on a page and the number of the elements can be increased as a user interact with the page (user scrolls to create a new dom element) like twitter.

To improve the performance of the page, I can think of only two things.

1. set display to none to invisible items to avoid reflow
2. remove invisible items from the dom then re-add them as needed.

Are they any other ways of improving a page with a lot of dom elements?

Performance with infinite scroll or a lot of dom elements?

Can I add any random attribute to &#39;window&#39; object in javascript? Some thing like:

    window.my_own_attr = &quot;my_value&quot;

Does it have any side effects with any libraries? And is it cross-browser compatible?

Can I add attributes to &#39;window&#39; object in javascript?

I am trying to build a PDF file out of a binary stream which I receive as a response from an Ajax request.

Via `XmlHttpRequest` I receive the following data:


    %PDF-1.4....
    .....
    ....hole data representing the file
    ....
    %% EOF


What I tried so far was to embed my data via `data:uri`. Now, there&#39;s nothing wrong with it and it works fine. Unfortunately, it does not work in IE9 and Firefox. A possible reason may be that FF and IE9 have their problems with this usage of the `data-uri`.

Now, I&#39;m looking for any solution that works for all browsers. Here&#39;s my code:

    // responseText encoding 
    pdfText = $.base64.decode($.trim(pdfText));

    // Now pdfText contains %PDF-1.4 ...... data...... %%EOF

    var winlogicalname = &quot;detailPDF&quot;;
    var winparams = &#39;dependent=yes,locationbar=no,scrollbars=yes,menubar=yes,&#39;+
				&#39;resizable,screenX=50,screenY=50,width=850,height=1050&#39;;

    var htmlText = &#39;&lt;embed width=100% height=100%&#39;
	                     + &#39; type=&quot;application/pdf&quot;&#39;
	                     + &#39; src=&quot;data:application/pdf,&#39;
	                     + escape(pdfText)
	                     + &#39;&quot;&gt;&lt;/embed&gt;&#39;; 
	                
	                // Open PDF in new browser window
	                var detailWindow = window.open (&quot;&quot;, winlogicalname, winparams);
	                detailWindow.document.write(htmlText);
	                detailWindow.document.close();


As I have said, it works fine with Opera and Chrome (Safari hasn&#39;t been tested). Using IE or FF will bring up a blank new window.

Is there any solution like building a PDF file on a file system
in order to let the user download it? I need the solution that works in all browsers, at least in IE, FF, Opera, Chrome and Safari.

I have no permission to edit the web-service implementation. So it had to be a solution at client-side. Any ideas?

How to build PDF file from binary string returned from a web-service using javascript

I wanted to use the Modernizr JS library to detect for some browser properties to determine what content to show or not show.

I have an app called [Pano2VR](http://gardengnomesoftware.com/pano2vr.php) which outputs both HTML5 and SWF. I need the HTML5 for iOS device users.

However, IE does not render this &quot;HTML5&quot; output at all. It seems their output uses CSS3 3D transforms and WebGL, one or more apparently unsupported in IE9.

So, for those users I need to display the Flash version. I was planning to use an IFRAME and either pass the SRC via a Modernizr script or document.write out the correct IFRAME code depending on browser.

All of which leads to how do I use Modernizr to detect simply IE or not IE? Or detect for CSS 3d transforms? 

Or is there another way to do this?


  

Correct way to use Modernizr to detect IE?

Say I have a single `span` element defined as an inline-block. It&#39;s only contents is plain text. When the font size is very large, you can clearly see how the browser adds a little padding above and below the text.

HTML:

   

CSS:

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-css --&gt;

    span {
      display: inline-block;
      font-size: 50px;
      background-color: green;
    }

    ​

&lt;!-- language: lang-html --&gt;

    &lt;span&gt;BIG TEXT&lt;/span&gt;

&lt;!-- end snippet --&gt;

Looking at the box model, it&#39;s clear the browser is adding padding _inside the content edge_. I need to remove this &quot;padding&quot;, one way is to simply alter the line-height, as with:

http://jsfiddle.net/7vNpJ/1/

This works great in Chrome but in Firefox the text is shifting towards the top (FF17, Chrome 23, Mac OSX).

Any idea of a cross-browser solution? Thanks!

Remove white space above and below large text in an inline-block element

**TL;DR;**

Is there a way to compress an image (mostly jpeg, png and gif) directly browser-side, before uploading it ? I&#39;m pretty sure JavaScript can do this, but I can&#39;t find a way to achieve it.

&lt;br /&gt;
Here&#39;s the full scenario I would like to implement:

- the user goes to my website, and choose an image via an `input type=&quot;file&quot;` element,
- this image is retrieved via JavaScript, we do some verification such as correct file format, maximum file size etc,
- if every thing is OK, a preview of the image is displayed on the page,
- the user can do some basic operations such as rotate the image by 90&#176;/-90&#176;, crop it following a pre-defined ratio, etc, or the user can upload another image and return to step 1,
- when the user is satisfied, the edited image is then compressed and &quot;saved&quot; locally (not saved to a file, but in the browser memory/page),-
- the user fill a form with data like name, age etc,
- the user click on the &quot;Finish&quot; button, then the form containing datas + compressed image is sent to the server (without AJAX),

The full process up to the last step should be done client side, and should be compatible on latest Chrome and Firefox, Safari 5+ and **IE 8+**. If possible, only JavaScript should be used (but I&#39;m pretty sure this is not possible).


I&#39;ve not code anything right now, but I&#39;ve thought about it already. File reading locally is possible via [File API][1], image previewing and editing could be done using [Canvas][2] element, but **I can&#39;t find a way to do the image compression part**.

According to [html5please.com][3] and [caniuse.com][4], supporting those browser is quite hard (thanks to IE), but could be done using polyfill such as [FlashCanvas][5] and [FileReader][6].

Actually, the goal is to reduce file size, so I see image compression as a solution. But, I know that uploaded images are going to be displayed on my website, every time at the same place, and I know the dimension of this display area (eg. 200x400). So, I could resize the image to fit those dimensions, thus reducing file size. I have no idea what would be the compression ratio for this technique.

What do you think ? Do you have any advice to tell me ? Do you know any way to compress an image browser-side in JavaScript ? Thanks for your replies.


  [1]: http://www.html5rocks.com/en/tutorials/file/dndfiles/
  [2]: http://www.html5rocks.com/en/tutorials/canvas/integrating/
  [3]: http://html5please.com/
  [4]: http://caniuse.com/
  [5]: http://flashcanvas.net/
  [6]: https://github.com/Jahdrien/FileReader

How to compress an image via Javascript in the browser?

I&#39;m having a little trouble with CSS and can&#39;t seem to find a solution. I have this HTML

    &lt;div id=&quot;closelink&quot;&gt;
      &lt;a href=&quot;&quot;&gt;Close&lt;/a&gt;
      Click to close
    &lt;/div&gt;
Now I want to hide the text &#171;Click to close&#187; only, without hiding neither the div, nor the link within it.

Can this be done?

Hide text node in element, but not children

So I&#39;ve been slowly replacing a lot of my normal jQuery code with native javascript, and I happened upon the `document.createTextNode()` and [related MDN documentation](https://developer.mozilla.org/en-US/docs/Web/API/document.createTextNode).  After reading I&#39;m somewhat confused what a text node is.  

I understand it can be used to put text inside `div`&#39;s, but I&#39;m sure there&#39;s a bit more to it than just &quot;use it to put words inside elements&quot;.  [Looking at this,](https://developer.mozilla.org/en-US/docs/Web/API/Text) it appears a text node can also refer to the text of attributes as well.

Can anyone provide a bit more of a definition of what a text node is and what it&#39;s used for?  Are there practical uses for this other than basic stuff like this?

    var div = document.createElement(&#39;div&#39;);
    var text = document.createTextNode(&#39;Y HALO THAR&#39;);
    div.appendChild(text);

Content Type	Original Author	Original Content on Stackoverflow
Question	hippietrail	View Question on Stackoverflow
Solution 1 - Html	raina77ow	View Answer on Stackoverflow

When working with text nodes should I use the "data", "nodeValue", "textContent" or "wholeText" field?

Html Problem Overview

Html Solutions

Solution 1 - Html

How to smooth matplotlib contour plot?

Java - null instanceof Object evaluates to both true and false

Attributions