How to write if statement in d3.js?

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by denis , in category: Javascript , 20 days ago

How to write if statement in d3.js?

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1 answer

Member

by addison , 19 days ago

@denis 

In D3.js, you can use the .attr() method of a selection to set attributes based on conditions using an if statement. Here's an example of how you can write an if statement in D3.js:

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// Example data
var data = [5, 10, 15, 20];

// Select the SVG container
var svg = d3.select("svg");

// Bind the data to circles
var circles = svg.selectAll("circle")
  .data(data)
  .enter()
  .append("circle")
  .attr("cx", function(d, i) {
    // Use an if statement to set the x-coordinate based on the data
    if (d < 10) {
      return i * 30 + 20;  // If the data is less than 10, set x-coordinate using i
    } else {
      return i * 30 + 50;  // If the data is greater than or equal to 10, set x-coordinate using i + 30
    }
  })
  .attr("cy", 50)
  .attr("r", 10);


In this example, an if statement is used inside the .attr() method to conditionally set the cx attribute of the circles based on the data. If the data value is less than 10, the x-coordinate is set using i * 30 + 20. Otherwise, if the data value is greater than or equal to 10, the x-coordinate is set using i * 30 + 50.