La función node.descendants() en la biblioteca d3.js se usa para generar y devolver una array de Nodes descendientes.
Sintaxis:
node.descendants();
Parámetros: Esta función no acepta ningún parámetro.
Valores devueltos: esta función devuelve una array.
A continuación se dan algunos ejemplos de la función dada anteriormente.
Ejemplo 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>
</head>
<body>
<script>
var obj = d3.hierarchy({
name: "rootNode",
children: [
{
name: "child1"
},
{
name: "child2",
children: [
{ name: "grandChild1" },
]
},
{
name: "child3",
children: [
{ name: "grandChild5" },
{ name: "grandChild6" },
{ name: "grandChild7" },
{ name: "grandChild8" },
]
}
]
});
// Descendant of child3
console.log("Descendant of child3 are: ");
console.log(obj.children[2]
.descendants()[0].data.name);
console.log(obj.children[2]
.descendants()[1].data.name);
console.log(obj.children[2]
.descendants()[2].data.name);
console.log(obj.children[2]
.descendants()[3].data.name);
console.log(obj.children[2]
.descendants()[4].data.name);
</script>
</body>
</html>
Producción:
Ejemplo 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>
</head>
<body>
<script>
var obj = d3.hierarchy({
name: "rootNode",
children: [
{
name: "child1"
},
{
name: "child2",
children: [
{ name: "grandChild1" },
]
},
{
name: "child3",
children: [
{ name: "grandChild5" },
{ name: "grandChild6" },
{ name: "grandChild7" },
{ name: "grandChild8" },
]
}
]
});
// Descendant of child3
console.log("Descendant of child3 are: ");
console.log(obj.children[2].descendants());
</script>
</body>
</html>
Producción:
