The d3.selector() function is used to return a function that returns the very first descendant of the element given as the parameter.
Syntax:
d3.selector(selector)
Parameters: This function takes only one parameter which is given above and described below:
- selector: This is the string of the element that is to be selected.
Return Values: This function returns a boolean value.
Below given are a few examples of the function given above.
Example 1:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> p{ line-height:5px; } </style> <body> <div> </div> <div> <p>This is para1</p> <p>This is para2</p> <p>This is para3</p> <p>This is para4</p> </div> <script src = </script> <script> // Parent of div is HTML var div = d3.select("div").select(d3.selector("div")); console.log(div); </script> </body> </html> |
Output:
Example 2:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> p{ line-height:5px; } </style> <body> <div> <p>This is para1 <p>This is para2</p> <p>This is para3</p> </p> </div> <script src = </script> <script> // First descendant of Div var para = d3.select("div").select(d3.selector("p")); console.log(para); // First descendant of Div var p = d3.select("div").select("p"); console.log(p); console.log("Both p and para are equal"); console.log(para.node()); console.log(p.node()); </script> </body> </html> |
Output:
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