D3.js selection.node() Function
The selection.node() function in D3.js is used to return the first element in the selection. If the selection does not contain any elements then it returns null.
Syntax:
selection.node()
Parameters: This function does not accept any parameters.
Return Values: This function returns the first element in the selection.
Example 1:
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent= "width=device-width,initial-scale=1.0"> <script src="https://d3js.org/d3.v4.min.js"> </script> <script src= "https://d3js.org/d3-selection.v1.min.js"> </script> </head> <body> <h2>Some text</h2> <div>Beginner for Beginner </div> <script> let selection = d3.selectAll("div") let div = selection.node(); console.log(div) // Printing innerHTML of the tag console.log(div.innerHTML) selection = d3.selectAll("h1") // Null is returned console.log(selection.node()) </script> </body> </html> |
Output:
Example 2:
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent= "width=device-width,initial-scale=1.0"> <script src="https://d3js.org/d3.v4.min.js"> </script> <script src= "https://d3js.org/d3-selection.v1.min.js"> </script> </head> <body> <div>Some text</div> <div>Beginner for <div>Beginner</div> </div> <div>Beginner <div></div> for Beginner</div> <div>Some text</div> <script> let selection = d3.selectAll("div") console.log(selection.node()) selection = d3.selectAll("h2") // Null is returned console.log(selection.node()) </script> </body> </html> |
Output:
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