The stack.value() method takes a function that returns the value associated with a key.
Syntax:
stack.value([value_func])
Parameters: This function accepts a single parameter as mentioned above and described below:
- value_func: This is a function returning the value associated with the key.
Return Value: This method has no return value.
Example:
HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <h1 style="text-align:center; color:green;"> neveropen </h1> <center> <canvas id="gfg" width="200" height="200"> </canvas> </center> <script> var data = [ { letter: { a: 3840, b: 1920, c: 960, d: 400 } }, { letter: { a: 1600, b: 1440, c: 960, d: 400 } }, { letter: { a: 640, b: 960, c: 640, d: 400 } }, { letter: { a: 320, b: 480, c: 640, d: 400 } } ]; var stackGen = d3.stack() // Defining keys .keys(["a", "b", "c", "d"]) // Defining value function .value((obj, key) => obj.letter[key]); var stack = stackGen(data); console.log(stack); </script> </body> </html> |
Output:
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