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D3.js interview questions
d3.interpolateObject(a,b) command is used to interpolate two objects in d3.js
A transition is a selection-like interface for animating changes to the DOM. Instead of applying changes instantaneously, transitions smoothly interpolate the DOM from its current state to the desired target state over a given duration.
To apply a transition, select elements, call selection.transition and then make the desired changes.
d3.select("body") .transition() .style("background-color", "red");
There are 7 types of slider are available in D3.js, they are
- Default slider
- Slider with start value
- Slider with slide event: 0
- Slider with default axis
- Slider with custom axis
- Slider with min, max and step values
- Vertical slider
In D3.js “Enter” selection is used to create new nodes for incoming data and “Exit” selection is used eliminate outgoing nodes that are no longer required.
D3.js uses CSS-style selectors to identify elements on which to operate.
You can use D3 js because
- D3.js lets you to build the data visualization framework
- D3.js focuses on binding data to DOM elements.
Mike Bostock wrote D3.js based on his work during his Ph.D. studies at the Stanford Visualization Group. Mike worked at the The New York Times for a while and is now independently working on D3.js.
D3 stands for Data-Driven Documents
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