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Deno 2.2 Improves Dependency Management and Expands Node.js Compatibility
Deno 2.2 enhances Node.js compatibility, improves dependency management, adds OpenTelemetry support, and expands linting and task automation for developers.
rax-canvas
Advanced tools
在 Weex 上依赖 gcanvas 在支付宝小程序中依赖 canvas 在 Web 和 Weex 中可以通过 ref 获取画布实例,在小程序中需要通过 createCanvasContext 和画布的 id 获取 canvas 上下文
$ npm install rax-canvas --save
import Canvas from 'rax-canvas';
注:
1、支持列表中的 代表 Web
代表 weex
代表阿里小程序
代表微信小程序
属性 | 类型 | 默认值 | 必填 | 描述 | 支持 |
---|---|---|---|---|---|
style | Object | - | ✘ | 通过内联的方式设置画布样式 | |
className | Object | - | ✘ | 设置画布的样式 | |
width | Number | 0 | ✘ | 设置画布的宽度 | |
height | Number | 0 | ✘ | 设置画布的高度 | |
onClick | Function | - | ✘ | 点击画布时触发的事件 | |
onLongPress | Function | - | ✘ | 长按画布时触发的事件 | |
onTouchStart | Function | - | ✘ | 触摸画布时触发的事件 | |
onTouchMove | Function | - | ✘ | 手指在画布上移动时触发的事件 | |
onTouchEnd | Function | - | ✘ | 结束触摸时触发的事件 | |
onTouchCancel | Function | - | ✘ | 触摸事件取消的时候触发的事件 |
获取到画布实例后,可以使用实例上的方法。
import { createElement, Component, render, createRef } from 'rax';
import Canvas from 'rax-canvas';
import DriverUniversal from "driver-universal"
class CanvasSample extends Component {
constructor(props) {
super(props);
this.raxCanvasDemo = createRef()
}
componentDidMount() {
const context = this.raxCanvasDemo.current.getContext();
context.fillStyle = 'red';
context.fillRect(0, 0, 100, 100);
}
render() {
return <Canvas style={{
width: 750,
height: 750
}} ref={this.raxCanvasDemo} />;
}
}
render(<CanvasSample />, document.body, { driver: DriverUniversal });
直接指定 width
或者 height
的优先级高于在 style
和 className
中指定的宽高。
FAQs
Canvas for Rax.
The npm package rax-canvas receives a total of 5 weekly downloads. As such, rax-canvas popularity was classified as not popular.
We found that rax-canvas demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 5 open source maintainers collaborating on the project.
Did you know?
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