How to append nested svg elements to dom with d3.js?

by haylee.mertz , in category: Javascript , a month ago

How to append nested svg elements to dom with d3.js?

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1 answer

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by samara , a month ago

@haylee.mertz 

To append nested SVG elements to the DOM using D3.js, you can follow these steps:

  1. Select the parent SVG element using D3.js. You can use the d3.select() function to select the parent SVG element either by element type or by ID. For example, d3.select("svg") or d3.select("#svg-container").
  2. Define the data that will drive the creation of the nested SVG elements. This can be an array of objects or any other data structure that you want to visualize.
  3. Use the .data() method of the selected parent SVG element to bind the data to the selection. This creates a selection of placeholders for the nested SVG elements based on the data.
  4. Use the .enter() method to enter the data and append a new SVG element for each data item. For example, you can use .enter().append("circle") to create a new
  5. Set the attributes and styles of the nested SVG elements based on the data. You can use D3.js methods like .attr() or .style() to set the attributes and styles of the SVG elements dynamically, based on the data.


Here's an example code snippet that demonstrates this process:

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// Step 1: Select the parent SVG element
const svg = d3.select("svg");

// Step 2: Define the data
const data = [10, 20, 30, 40, 50];

// Step 3: Bind the data to the selection
const circles = svg.selectAll("circle")
  .data(data);

// Step 4: Enter and append the nested SVG elements
circles.enter()
  .append("circle")
  .attr("cx", (d, i) => i * 50)
  .attr("cy", 50)
  .attr("r", (d) => d);

// Step 5: Set attributes and styles
circles.attr("fill", "blue")
  .attr("stroke", "black");


In this example, the code appends <circle> elements as children of the parent SVG element based on the data array. The position, radius, and other attributes of each circle are set based on the data. Finally, the attributes and styles of the nested SVG elements are set using the circles selection.