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@yugu/watermark

v1.0.5

Published

javascript watermark 通用js水印

Downloads

396

Readme

Watermark 类

  • 通用 js 生成水印类,给页面的某个区域加上水印。
  • 页面需要添加水印标识版权时使用。
  • 适用于防止信息盗用。

注意:该类会给传入的static水印容器添加position:relative;样式,请注意处理。由于汉字和英文书写展示方式不同,多行展示并旋转时可能导致边缘被切割。

该类参考 Ant Design React 项目中 Watermark 组件改写,属性可参考Watermark

Watermark

| 参数 | 说明 | 类型 | 默认值 | | ----------- | ----------------------------------------------------------- | ------------------ | ------------- | | width | 水印的宽度,content 的默认值为自身的宽度 | number | 120 | | height | 水印的高度,content 的默认值为自身的高度 | number | 64 | | inherit | 是否将水印传导给弹出组件如 Modal、Drawer | boolean | true | | rotate | 水印绘制时,旋转的角度,单位 ° | number | -22 | | zIndex | 追加的水印元素的 z-index | number | 9 | | globalAlpha | 水印透明度 0-1 | number | 0.15 | | image | 图片源,建议导出 2 倍或 3 倍图,优先级高 (支持 base64 格式) | string | - | | content | 水印文字内容 | string | string[] | '菠萝吹雪' | | font | 文字样式 | Font | Font | | gap | 水印之间的间距 | [number, number] | [100, 100] | | offset | 水印距离容器左上角的偏移量,默认为 0 | [number, number] | [0, 0] | | isDebug | 开启调试,给 canvas clip 添加背景色 | boolean | false |

API

| 方法 | 说明 | | --------------- | --------------------------------------- | | updateWatermark | 更新水印,传入值可选,为 watermark 参数 |

Font

| 参数 | 说明 | 类型 | 默认值 | | ---------- | ---------------- | ----------------------------------------------------------------------------------------------------------------- | ---------- | | color | 字体颜色 | CanvasFillStrokeStyles.fillStyle | #333 | | fontSize | 字体大小 | number | 16 | | fontWeight | 字体粗细 | normal | light | weight | number | normal | | fontFamily | 字体类型 | string | sans-serif | | fontStyle | 字体样式 | none | normal | italic | oblique | normal | | textAlign | 指定文本对齐方向 | CanvasTextAlign |

使用示例

在线示例,点击进入

  import Watermark from '@yugu/watermark'
  const watermark = new Watermark({
    container:'your-dom',
    font:{
      fontSize:22
    },
    ...
  })
  watermark.updateWatermark({
    rotate:0,
    font:{
      fontSize:12
    }
  })