I think you'll find it works if you assign font-size as a style rather than as an attribute. .style("font-size", "34px"). ... <看更多>

For a base font size of 10px , a value of 1em is translated into 10px . 2em into 20px . And so on. By computing the ratio between the width taken by a label ... ... <看更多>

D3.js is a JavaScript library for manipulating documents based on data. ... already here</p> <script> d3.select("p") // select <p> tag .style("font-size", ... ... <看更多>

It seems like it's computing the line height based on the font-size it can find before displaying the annotations (which makes sense). But given that d3.js ... ... <看更多>