The set.add() function in D3.js is used to add the specified value string to the created set.
Syntax:
d3.set().add(element);
Parameters: This function accepts single parameter element which is going to be added into the created set.
Return Value: This function does not returns any values.
Below programs illustrate the d3.set.add() function in D3.js:
Example 1:
<!DOCTYPE html> <html> <head> <title> d3.set.add() Function</title>
</head> <body> <script>
// Initialising the set
var set = d3.set()
.add( "Geeks" )
.add( "Geeks" )
.add( "gfg" );
// Checking whether the desired element is
// present or not
A = set.has( "GeeksforGeeks" );
B = set.has( "Ram" );
C = set.has( "Geeks" );
// Getting the output of true or false
console.log(A);
console.log(B);
console.log(C);
</script>
</body> </html> |
Output:
false false true
Example 2:
<!DOCTYPE html> <html> <head> <title> d3.set.add() Function</title>
</head> <body> <script>
// Initialising the set
var set = d3.set().add( "a" ).add(1).add(123);
// Checking whether the desired element is
// present or not
A = set.has( "a" );
B = set.has(123);
C = set.has(5);
// Getting the output of true or false
console.log(A);
console.log(B);
console.log(C);
</script>
</body> </html> |
Output:
true true false
Ref: https://devdocs.io/d3~5/d3-collection#set_add