The selection.classed() function is used to set the class to the selected element. This function can also be used to unset the class to a particular element that is selected.
Syntax:
selection.classed(names[, value]);
Parameters: The above-given function takes two parameters which are given above and described below:
- name: It is the name of the class to be given to the element that is selected.
- value: It is the boolean value i.e true or false to set or unset the class.
Return Values: This function does not return anything.
Example 1: Setting the class name.
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent="width=device-width, initial-scale=1.0"> </script> </head> <body> <div> <a>neveropen</a> </div> <script> // Sets the class to the a tag var a = d3.select("a") .classed("className", true); // This will select the anchor tag var divselect = document.querySelector(".className"); console.log(divselect.innerHTML); </script> </body> </html> |
Output:
neveropen
Example 2: Unset the class name.
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" path1tent="width=device-width, initial-scale=1.0"> </script> </head> <body> <div> <p class="classGiven classGiven2"> neveropen </p> </div> <script> // Unsets the class named classGiven // to the "p" tag var a = d3.select("p") .classed("classGiven2", false); // This will select the "p" tag var divselect = document .querySelector(".classGiven"); console.log(divselect.innerHTML); // This will not select the "p" tag // As the classGiven 2 is unset var divselect = document .querySelector(".classGiven2"); console.log(divselect); </script> </body> </html> |
Output:
neveropen null
