The d3.linkHorizontal() method returns a new link generator with Horizontal tangents. It is typically used when the root is on the top/bottom edge with the children going down/up.
Syntax:
var link = d3.linkHorizontal() .x(function(d) { return d.x; }) .y(function(d) { return d.y; });
Parameters: This function does not take any parameter.
Return Value: This method returns a new link generator.
Example:
HTML
<!DOCTYPE html> < html > < head > Â Â Â Â < meta charset = "utf-8" > Â
    < script src =     </ script > </ head > Â
< body > Â
    < h1 style = "text-align: center; color: green;" >         neveropen     </ h1 > Â
    < h3 style = "text-align: center;" >         D3.js | linkHorizontal() Method     </ h3 > Â
    < center >     < svg id = "gfg" width = "200" height = "200" ></ svg >     </ center > Â
    < script > Â
        var data = [             {source: [100,25], target: [200,175]},             {source: [100,25], target: [25,175]}];                // Horizontal link generator         var link = d3.linkHorizontal()                 .source(function(d) {                     return [d.source[1], d.source[0]];                 })                 .target(function(d) {                     return [d.target[1], d.target[0]];                 });                //Adding the link paths         d3.select("#gfg")         .selectAll("path")         .data(data)         .join("path")         .attr("d", link)         .classed("link", true); Â
    </ script > </ body > Â
</ html > |
Output: