HTML | canvas lineCap Property

The canvas lineCap property is used to set or return the style of end caps of line. The line can have one of three cap styles: butt, round, or square. The default value of canvas lineCap property are butt. The lineCap property must be set before calling the stroke() function.

Syntax:

context.lineCap = "butt|round|square";

Property Values:

butt: It is the default style. This property value adds the flat edge at the each end of the line.
round: This property value adds the end cap at the each end of the line.
square: This property value adds the square cap at the each end of the line.

Note: The value round and square makes the line slightly longer.

Example 1: This example illustrates the butt property value.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML canvas lineCap Property 
    </title> 
</head> 
  
<body style="text-align:center;"> 
      
    <h1>GeeksforGeeks</h1> 
      
    <h2>HTML canvas lineCap Property</h2> 
      
    <canvas id="GFG" width="500" height="200"
        style="border:1px solid black;"> 
    </canvas> 
      
    <script> 
        var canvas_id = document.getElementById("GFG"); 
        var context = canvas_id.getContext("2d"); 
          
        context.beginPath(); 
        context.lineWidth = 35; 
        context.lineCap = "butt"; 
        context.moveTo(50, 100); 
        context.lineTo(450, 100); 
        context.strokeStyle ="green"; 
        context.stroke(); 
    </script> 
</body> 
  
</html>                     

Output:

Example 2: This example illustrates the round property value.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML canvas lineCap Property 
    </title> 
</head> 
  
<body style="text-align:center;"> 
      
    <h1>GeeksforGeeks</h1> 
      
    <h2>HTML canvas lineCap Property</h2> 
      
    <canvas id="GFG" width="500" height="200"
        style="border:1px solid black;"> 
    </canvas> 
      
    <script> 
        var canvas_id = document.getElementById("GFG"); 
        var context = canvas_id.getContext("2d"); 
          
        context.beginPath(); 
        context.lineWidth = 35; 
        context.lineCap = "round"; 
        context.moveTo(50, 100); 
        context.lineTo(450, 100); 
        context.strokeStyle ="green"; 
        context.stroke(); 
    </script> 
</body> 
  
</html>                     

Output:

Example 3: This example illustrates the square property value.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML canvas lineCap Property 
    </title> 
</head> 
  
<body style="text-align:center;"> 
      
    <h1>GeeksforGeeks</h1> 
      
    <h2>HTML canvas lineCap Property</h2> 
      
    <canvas id="GFG" width="500" height="200"
        style="border:1px solid black;"> 
    </canvas> 
      
    <script> 
        var canvas_id = document.getElementById("GFG"); 
        var context = canvas_id.getContext("2d"); 
          
        context.beginPath(); 
        context.lineWidth = 35; 
        context.lineCap = "square"; 
        context.moveTo(50, 100); 
        context.lineTo(450, 100); 
        context.strokeStyle ="green"; 
        context.stroke(); 
    </script> 
</body> 
  
</html>                     

Output:

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