There are three ways to create dotted lines in HTML: CSS border-style property: Use dashed or dotted values ??to create dotted lines. SVG elements: Use the stroke-dasharray attribute to create a dashed line, controlling the length and spacing of dashes or dots. Canvas element: Use the setLineDash() method to create dashed lines, providing more flexibility.
How to create dotted lines in HTML
Using CSS border-style Properties
This is the most common way to create dashed lines using HTML and CSS. The border-style property accepts the following values ??to create a dashed line:
-
dashed: Creates a dashed line consisting of dashes. -
dotted: Creates a dotted line composed of dots.
Example:
<p style="border: 1px dashed black;">虛線段落</p>
Using SVG elements
SVG elements (such as <line> and <path>) can be used to create dashed lines using the stroke-dasharray property. stroke-dasharray Accepts an array of values ??representing the length and spacing of dashes or dots for a dashed line.
Example:
<svg width="100" height="100"> <line x1="0" y1="0" x2="100" y2="100" stroke-dasharray="5 10" /> </svg>
Using the Canvas element
The Canvas element uses the JavaScript API to create dashed lines. The getContext() method returns a canvas context object that provides the setLineDash() method.
Example:
<canvas id="canvas" width="100" height="100"></canvas>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
ctx.setLineDash([5, 10]);
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(100, 100);
ctx.stroke();
</script>Choose a method
Selecting the most appropriate dash line creation method depends on your specific needs. The CSS border-style property is the simplest method, but the SVG and Canvas elements offer more flexibility.
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