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Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on a page via click event. I am not loading any other library to the page, so I am looking for some native way using the React library. This is what I have so far. I would like to show the results...
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Sass .scss: Nesting and multiple classes?

...ng the &. This notation is most often used to write pseudo-elements and -classes: .element{ &:hover{ ... } &:nth-child(1){ ... } } However, you can place the & at virtually any position you like*, so the following is possible too: .container { background:red; #...
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Django Rest Framework: Dynamically return subset of fields

... You can override the serializer __init__ method and set the fields attribute dynamically, based on the query params. You can access the request object throughout the context, passed to the serializer. Here is a copy&paste from Django Rest Framework documentation examp...
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Hide options in a select list using jQuery

...py of the select before you remove items, this allows you to easily remove and then append the missing items back. share | improve this answer | follow | ...
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Where to put model data and behaviour? [tl; dr; Use Services]

I am working with AngularJS for my latest project. In the documentation and tutorials all model data is put into the controller scope. I understand that is has to be there to be available for the controller and thus within the corresponding views. ...
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Proper way to handle multiple forms on one page in Django

... 4) Add a hidden field identifying the form and check the value of this field in your view. – Soviut Jun 14 '11 at 3:40 ...
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jQuery using append with effects

...isplays is updated as soon as the div is appended. So, to combine Mark B's and Steerpike's answers: Style the div you're appending as hidden before you actually append it. You can do it with inline or external CSS script, or just create the div as <div id="new_div" style="display: none;"> .....
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Facebook Post Link Image

...posts a link on facebook, a script usually scans that link for any images, and displays a quick thumbnail next to the post. For certain URLs though (including mine), FB doesn't seem to pick up anything, despite their being a number of images on that page. ...
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Mockito: InvalidUseOfMatchersException

I have a command line tool that performs a DNS check. If the DNS check succeeds, the command proceeds with further tasks. I am trying to write unit tests for this using Mockito. Here's my code: ...
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What's “tools:context” in Android layout files?

...ge of the activity, such as what the layout theme should be in the preview and where to insert onClick handlers when you make those from a quickfix share | improve this answer | ...