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Routine Poutine26,050 Points
Are "attribute" and "property" synonymous, as HTML has attribute:value pairs and CSS has property:value pairs?
Steven Parker221,328 Points
Depending on the context, those words are sometimes used interchangeably. But in other contexts they can have specific and different meanings.
For example, jQuery has different methods for accessing a property and an attribute. One can say a checkbox element has a "checked" property and also an attribute. The attribute should be used only to set the initial value of the checkbox. The checked attribute value does not change with the state of the checkbox, while the checked property does.