The d3.area.context() method lets you render the area in a canvas element’s context. The area will be rendered in the current context when the generator is invoked. We can set the context of our line on our own using this method like color, stroke, fill, etc. The default value is null.
Syntax:
d3.area.context(_context);
Parameters:
- _context: Context set by the user.
Return Value: This method returns the current context.
Example 1:
HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <h1 style="text-align: center; color: green;"> neveropen </h1> <h3 style="text-align: center;"> D3.js | area.context() Method </h3> <center> <canvas id="gfg" width="200" height="200"> </canvas> </center> <script> var data = [ {xpoint: 25, ypoint: 150}, {xpoint: 75, ypoint: 50}, {xpoint: 100, ypoint: 150}, {xpoint: 100, ypoint: 50}, {xpoint: 200, ypoint: 150}]; var context = d3.select("#gfg") .node().getContext("2d"); var Gen = d3.area() .x((p) => p.xpoint) .y0((p) => p.ypoint/2) .y1((p) => p.ypoint) .context(context); context.translate(10,50); Gen(data); context.strokeStyle = "black"; context.fillStyle = "green"; context.fill(); context.stroke(); </script> </body> </html> |
Output:
Example 2:
HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <h1 style="text-align: center; color: green;"> neveropen </h1> <h3 style="text-align: center;"> D3.js | area.context() Method </h3> <center> <canvas id="gfg" width="200" height="200"> </canvas> </center> <script> var points = [ {x: 50, y: 10}, {x: 150, y: 30}, {x: 200, y: 150}, {x: 250, y: 10}, {x: 300, y: 150}, {x: 350, y: 50}, {x: 400, y: 190}]; var context = d3.select("#gfg") .node().getContext("2d"); var Gen = d3.area() .x((p) => p.x) .y0((p) => p.y/2) .y1((p) => p.y) .context(context); context.translate(10,10); Gen(points); context.strokeStyle = "black"; context.fillStyle = "green"; context.fill(); context.stroke(); </script> </body> </html> |
Output:
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!