javascript 用fabric.js画一条虚线
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Drawing a dashed line with fabric.js
提问by Hartwig
I'd like to draw a dashed line using fabric.js. I've found Issue #603 on github that should implement this feature.However I didn't find any example code and can't get it to work with fabric.js 1.2.1.
我想用fabric.js 画一条虚线。 我在 github 上发现问题 #603 应该实现这个功能。但是我没有找到任何示例代码并且无法让它与 fabric.js 1.2.1 一起工作。
Is it already part of fabric.js 1.2.1 or do I have to get it off github directly and build it myself? Could someone provide me with a simple example to get me started?
它已经是 fabric.js 1.2.1 的一部分还是我必须直接从 github 上获取它并自己构建它？有人可以为我提供一个简单的例子来让我开始吗？
回答by Matěj G.
The property you're looking for is strokeDashArraywhich encodes the SVG attribute stroke-dasharray. It expects an array that describes the pattern of dashes and gaps, see the linked page for more details.
您要查找的属性是strokeDashArray对 SVG 属性进行编码的属性stroke-dasharray。它需要一个描述破折号和间隙模式的数组，有关更多详细信息，请参阅链接页面。
An example of usage may look like the following, which would create a dashed black line with equally spaced 5px fills:
使用示例可能如下所示，这将创建一条具有等距 5px 填充的黑色虚线：
new fabric.Line([0, 20, 100, 20], {
strokeDashArray: [5, 5],
stroke: 'black'
});
