D3.js selection.classed() Function
Last Updated :
06 Sep, 2020
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 >GeeksforGeeks</ 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:
GeeksforGeeks
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" >
GeeksforGeeks
</ 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:
GeeksforGeeks
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