Watermark

Introduction

简单的页面水印工具，默认挂载到document.body上

new Watermark().set('').draw().destory();

const watermark = new Watermark({name: '罗海', id: '10001'}).draw();

开始使用

安装

npm install page-watermark --registry http://192.168.13.184:4873 --save

API

constructor([el][, options])

• 参数:

    employee {Object} [{...}]      雇员信息
      id     {Number} [10001]      工号
      name   {String} ['test001']    姓名

• 实例:

  • new Watermark();

  • new Watermark({name: 'test001', id: '10001'});

• 注意:

  示例代码:

  
    /*
     * use api
     */
    const watermark = new Watermark();
    // ... do some action
    watermark.draw();
    // you can access canvas by watermark.canvas properity
    watermark.render();   // must after draw call

  
    /*
     * use pure js
     */
    const watermark = new Watermark();
    watermark.draw();
    const canvas = watermark.draw().canvas;
    const dataUrl = canvas.toDataURL();
    const body = document.body;
    body.style.background = `url(${dataUrl})`;

mount()

• 使用:

  挂载水印到页面上

• 示例代码:

  • const watermark = new Watermark(); // create a instance of Watermark
    watermark.mount();  // mount to document.body
    // watermark.draw();  // dont fotget to use draw() to display watermark on mounted element

set(options)

• Arguments:

    employee {Object} [{...}]      雇员信息
      id     {Number} [10001]      工号
      name   {String} ['test001']    姓名

• 使用:

  It's default value is same as constructor You can use set function to re-configurate watermark style

• 示例代码:

  •   const watermark = new Watermark();
      // if you want to re-configurate
      watermark.set({
        id: '10001'
        name: 'test001', 
      });
      // watermark.draw();  must use draw() to display

draw()

• 使用:

  use this function to render watermark on the mounted element.

• 示例代码:

  • new Watermark().draw();

  • new Watermark().set().mount().draw();

  • new Watermark().set().draw();

destory()

• 使用:

  • unmount element
  • disconnect mutation observer
  • change options to default value

• 示例代码:

  • new Watermark().set().mount().destory();