How to dynamically add a class to manual class names?

You can either do this, normal JavaScript: className={‘wrapper searchDiv ‘ + this.state.something} or the string template version, with backticks: className={`wrapper searchDiv ${this.state.something}`} Both types are of course just JavaScript, but the first pattern is the traditional kind. Anyway, in JSX, anything enclosed in curly brackets is executed as JavaScript, so you can basically do whatever … Read more

How to disable margin-collapsing?

There are two main types of margin collapse: Collapsing margins between adjacent elements Collapsing margins between parent and child elements Using a padding or border will prevent collapse only in the latter case. Also, any value of overflow different from its default (visible) applied to the parent will prevent collapse. Thus, both overflow: auto and … Read more

Align inline-block DIVs to top of container element

Because the vertical-align is set at baseline as default. Use vertical-align:top instead: .small{ display: inline-block; width: 40%; height: 30%; border: 1px black solid; background: aliceblue; vertical-align:top; /* <—- this */ } http://jsfiddle.net/Lighty_46/RHM5L/9/ Or as @f00644 said you could apply float to the child elements as well.

Is quoting the value of url() really necessary?

The W3C says quotes are optional, all three of your ways are legal. Opening and closing quote just need to be the same character. If you have special characters in your URL, you should use quotes or escape the characters (see below). Syntax and basic data types The format of a URI value is ‘url(‘ … Read more

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