Issues in the d3.js chart

I'm facing an issue with some incorrect lines appearing in my d3.js chart. Strangely, the problem seems to disappear when I switch tabs on Chrome and return to the chart's tab.

It's puzzling to figure out the root cause of this issue, so I will attach an image to provide a clearer explanation.

https://i.stack.imgur.com/8ZQml.png

Below is the JavaScript code that updates the chart (I am using Vue.js)

           const line = d3.line()
                            .x((_d,i) => this.xScale(this.zoom* i))
                            .y(d => this.yScale(d))
                            .curve(d3.curveBasis);
            
            this.svg.select('#g-path').select('path')
            .attr('d', line(this.data))
            
            .style("stroke-linejoin", "round")
            .style('fill', 'none')
            .style('stroke', 'green')
            .style('stroke-width', 1);

EDIT: I've noticed that the lines also disappear if I click on another component on the page.

Appreciate any help!

javascriptvue.jssvgd3.jscharts

Answer №1

It seems like there might be an issue with the miter angle

When two line segments meet at a sharp angle and miter joins are specified for stroke-linejoin, sometimes the miter can extend beyond the thickness of the line stroking the path. The stroke-miterlimit ratio determines when this limit is exceeded, switching the join from a miter to a bevel.
source

While a round line join may not be the cause of the issue, there could be calculation errors when lines come close together.

Consider using a miter line join to prevent the lines from extending too far.

  .style("stroke-linejoin", "miter")
  .style("miter-clip", "1")

Answer №2

After some troubleshooting, I believe I have successfully resolved the issue at hand. In order to ensure that the chart is responsive, I made use of a viewBox for the svg element. Implementing the viewBox appears to have rectified the problem.

To assist others facing similar challenges, I will share the code below:

Javascript:

this.svg = d3.select("#chart")
.append("svg")
.attr("viewBox", `0 0 800 420`);

HTML:

<template>
      <div id="chart"></div>
</template>

Appreciate the helpful responses from everyone!

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