html div tooltip,d3.js - d3/html simple div tooltip location - Stack Overflow

You're missing the necessary CSS to position the

. Just adding position: absolute; (docs) will position the tooltip div as desired.

I know this doesn't require so much of explanation but I haven't been on SO since a while so just trying to getting back into the groove. :p

Anyway, if you're positioning the div by d3.event.pageX and d3.event.pageY, here's how it'll look:

var margin = {top:20, right: 20, bottom: 20, left: 20};

var svg = d3.select("#visualisation")

.append("svg")

.attr("width", 960)

.attr("height", 600);

var g = svg.append("g")

.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

g.append("circle")

.attr("class", "circle")

.attr("cx", 200)

.attr("cy", 100)

.attr("r", 50)

.attr("fill", "red")

.style("opacity", 0.5);

var tooltip = d3.select("#visualisation")

.append("div").classed('tooltip', true)

.style("visibility", "hidden");

d3.select(".circle")

.on("mouseover", mouseover)

.on("mousemove", mousemove)

.on("mouseout", mouseout)

function mouseover() {

d3.select(this)

.transition()

.duration(500)

.style("opacity", "1");

tooltip

.style("visibility", "visible")

// .style("opacity", 1)

}

function mousemove() {

tooltip.html("is it visible?")

.style("left", d3.event.pageX+'px')//(d3.select(this).attr("cx")) + "px")

.style("top", d3.event.pageY+'px') //(d3.select(this).attr("cy")) + "px")

}

function mouseout() {

d3.select(this)

.transition()

.duration(500)

.style("opacity", 0.5);

tooltip

.style("visibility", "hidden")

// .style("opacity", 0);

}

div#visualisation div.tooltip {

position: absolute;

pointer-events: none;

}

If you're positioning it at a particular x,y (as in your snippet), it'll look like the following snippet:

var margin = {top:20, right: 20, bottom: 20, left: 20};

var svg = d3.select("#visualisation")

.append("svg")

.attr("width", 960)

.attr("height", 600);

var g = svg.append("g")

.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

g.append("circle")

.attr("class", "circle")

.attr("cx", 200)

.attr("cy", 100)

.attr("r", 50)

.attr("fill", "red")

.style("opacity", 0.5);

var tooltip = d3.select("#visualisation")

.append("div").classed('tooltip', true)

.style("visibility", "hidden");

d3.select(".circle")

.on("mouseover", mouseover)

.on("mousemove", mousemove)

.on("mouseout", mouseout)

function mouseover() {

d3.select(this)

.transition()

.duration(500)

.style("opacity", "1");

tooltip

.style("visibility", "visible")

// .style("opacity", 1)

}

function mousemove() {

tooltip.html("is it visible?")

.style("left", (d3.select(this).attr("cx")) + "px")

.style("top", (d3.select(this).attr("cy")) + "px")

}

function mouseout() {

d3.select(this)

.transition()

.duration(500)

.style("opacity", 0.5);

tooltip

.style("visibility", "hidden")

// .style("opacity", 0);

}

div#visualisation div.tooltip {

position: absolute;

pointer-events: none;

}

Additions:

Added a class 'tooltip' to this tooltip div.

Added pointer-events: none; to avoid flickering of the tooltip (take it out and you'll notice the difference)

Hope this helps.