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Last active August 16, 2016 10:01
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Rotating text using a range input in v4

This is a demonstration of the use of the html 'range' input to rotate a text element using d3.js v4.

This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 4 of d3.js.

<!DOCTYPE html>
<meta charset="utf-8">
<title>Input test</title>
<label for="nAngle"
style="display: inline-block; width: 240px; text-align: right">
angle = <span id="nAngle-value">…</span>
<input type="range" min="0" max="360" id="nAngle">
<script src=""></script>
var width = 600;
var height = 300;
var holder ="body")
.attr("width", width)
.attr("height", height);
// draw the text
.style("fill", "black")
.style("font-size", "56px")
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.attr("transform", "translate(300,150) rotate(0)")
// when the input range changes update the angle"#nAngle").on("input", function() {
// Initial starting angle of the text
// update the element
function update(nAngle) {
// adjust the text on the range slider"#nAngle-value").text(nAngle);"#nAngle").property("value", nAngle);
// rotate the text"text")
.attr("transform", "translate(300,150) rotate("+nAngle+")");
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