核心架构请查阅 canvas-select 组件，一个用于图片标注的 javascript 库，基于 canvas，简单轻量，支持矩形、多边形、点、折线、圆形标注、网格标注。 使用离屏 canvas 绘制静态背景图片，避免频繁绘制。 避免浮点数运算，使用 Math.round()或 Math.floor()进行取整。

In the cold days of December, as Yerevan was wrapped in winter’s breath, young artist Davit Minasyan created a true island of ...

These tags add menus, toggles, media, forms, and responsive images with minimal code.

Apple today released a new update for Safari Technology Preview, the experimental browser that was first introduced in March ...

National Chocolate Cake Day on Jan. 27 is an open invitation to bend the rules and make a classic cake even more irresistible ...

In this energisingly original novel, an emotionally detached English student at college in New York tells a big lie Lies offend our sense of justice: generally, we want to see the liar unmasked and ...

The Frist Art Museum presents The Impressionist Revolution: Monet to Matisse from the Dallas Museum of Art, an exhibition ...

Safari Technology Preview 235 版本包含了针对 CSS、Canvas、剪贴板、HTML、JavaScript 以及 MathML 等核心技术的修正与优化。 此外，该版本也对媒体处理、网络功能、转译表现、Web ...

Security camera footage shows Maria climbing into the hammock for a nap, with Gabriel joining her carrying a case of felt-tip ...

It doesn't do it quite how you think though.

The struggles and breakthroughs of Chinese American movie star Anna May Wong Anna May Wong was a pioneering actress considered to be the first major Asian American film star, despite the limits ...