d3.js hierarchy()用法及代碼示例

D3.js庫中的d3.hierarchy()函數用於根據給定的分層數據構造根節點數據。給出的數據必須是對象的，並且必須表示根節點。

用法:

d3.hierarchy(data[, children]);

參數：該函數采用上麵給出的和下麵描述的單個參數。

data:此參數是表示分層數據的對象。

返回值：該函數返回一個對象。

下麵給出的是上麵給出的函數的一些例子。

範例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:"grandChild2" }, 
                        { name:"grandChild3" }, 
                        { name:"grandChild4" } 
                    ] 
                }, 
                { 
                    name:"child3", 
                    children:[ 
                        { name:"grandChild5" }, 
                        { name:"grandChild6" }, 
                    ] 
                } 
            ] 
        }); 
        console.log(obj);         
    </script> 
</body> 
  
</html>

輸出：

範例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" }, 
                    ] 
                } 
            ] 
        }); 
        console.log(obj); 
        console.log(obj.data); 
        console.log(obj.data.children[0]);         
    </script> 
</body> 
  
</html>

輸出：

相關用法

注：本文由純淨天空篩選整理自tarun007大神的英文原創作品 D3.js hierarchy() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。