Join Ray Villalobos for an in-depth discussion in this video Adding a tooltip, part of Data Visualization with D3.js.
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…So, right now our graph has no sort of feedback as to the value of…these different points.…So, I'm going to fix that by adding some tool tips and…that will let us practice a little bit of everything we've learned so far.…So, to do that I will need to create a variable,…I'll do it right before the chart.…So, up here I'll create a variable called tooltip, and…this is going to hold our tooltip, of course.…And we'll set this to be a d3.select and…we'll select the body element and append a div.…
And then, we'll set some styles up.…So, style, and we'll do, let me just copy this because we'll need it a few times.…First we'll adjust the position to be absolute.…That will allow it to follow in relationship to the page and…then we will do a bit of padding around the tooltip.…It's going to have a zero on the top and bottom and 10 pixels on each side.…And then we will do a background of white.…
And then we'll do opacity and we'll set that 0.9.…We don't need the quotes because it's just a number.…You see the opacity needs to be set to 0 because we don't want it…
- What is D3.js?
- Creating a basic document structure
- Controlling HTML DOM elements
- Binding data to the DOM
- Drawing SVG graphics with D3
- Using ordinal scales
- Adding events and transitions
- Working with data
- Creating and adjusting layouts