3

我正在开发一个项目，我希望该功能可以打印页面的特定元素。有一个名为 VueHtmlToPaper 的 mixin/plugin 可以完全满足我的需求，但是我无法将它导入到我的 Vue 3 CLI 项目中，因为它是为 VueJS2 创建的并且全局 API 不同。任何帮助表示赞赏。

main.js

import { createApp } from 'vue'

import App from './App.vue'

 createApp(App).mount('#app')

项目结构：

在此处输入图像描述

4

2 回答 2

7

由于这个插件与 vue 3 不兼容，我们可以基于vue-html-to-paper插件来做我们的插件：

  1. 在项目根目录中创建一个名为 plugins 的文件夹，然后在其中添加VueHtmlToPaper.js具有以下内容的文件：

function addStyles(win, styles) {
    styles.forEach((style) => {
      let link = win.document.createElement("link");
      link.setAttribute("rel", "stylesheet");
      link.setAttribute("type", "text/css");
      link.setAttribute("href", style);
      win.document.getElementsByTagName("head")[0].appendChild(link);
    });
  }
  
  const VueHtmlToPaper = {
    install(app, options = {}) {
      app.config.globalProperties.$htmlToPaper = (
        el,
        localOptions,
        cb = () => true
      ) => {
        let defaultName = "_blank",
          defaultSpecs = ["fullscreen=yes", "titlebar=yes", "scrollbars=yes"],
          defaultReplace = true,
          defaultStyles = [];
        let {
          name = defaultName,
          specs = defaultSpecs,
          replace = defaultReplace,
          styles = defaultStyles
        } = options;
  
        // If has localOptions
        // TODO: improve logic
        if (!!localOptions) {
          if (localOptions.name) name = localOptions.name;
          if (localOptions.specs) specs = localOptions.specs;
          if (localOptions.replace) replace = localOptions.replace;
          if (localOptions.styles) styles = localOptions.styles;
        }
  
        specs = !!specs.length ? specs.join(",") : "";
  
        const element = window.document.getElementById(el);
  
        if (!element) {
          alert(`Element to print #${el} not found!`);
          return;
        }
  
        const url = "";
        const win = window.open(url, name, specs, replace);
  
        win.document.write(`
          <html>
            <head>
              <title>${window.document.title}</title>
            </head>
            <body>
              ${element.innerHTML}
            </body>
          </html>
        `);
  
        addStyles(win, styles);
  
        setTimeout(() => {
          win.document.close();
          win.focus();
          win.print();
          win.close();
          cb();
        }, 1000);
  
        return true;
      };
    }
  };
  
  export default VueHtmlToPaper;

我只是复制/粘贴了这段代码，然后替换Vue为app，然后将其导入main.js：

import { createApp } from 'vue'

import App from './App.vue'

 import  VueHtmlToPaper from './plugins/VueHtmlToPaper'

let app=createApp(App);

 app.use(VueHtmlToPaper)

 app.mount('#app')

然后在任何组件中使用它，例如：

<template>
<div class="home">
    <img alt="Vue logo" src="../assets/logo.png">

    <!-- SOURCE -->
    <div id="printMe">
        <h1>Print me!</h1>
    </div>
    <!-- OUTPUT -->
    <button @click="print">print</button>

</div>
</template>

<script lang="ts">
import {
    defineComponent
} from 'vue';
import HelloWorld from '@/components/HelloWorld.vue'; /

export default defineComponent({
    name: 'Home',
    components: {
        HelloWorld,
    },
    methods: {
        print() {
            this.$htmlToPaper('printMe')
        }
    },
    mounted() {

    }
});
</script>

现场演示

于 2020-11-13T16:56:38.977 回答
1

为了防止出现额外的窗口，我将 window 替换为 VueHtmlToPaper.js 中的 iframe

function addStyles(win, styles) {
    styles.forEach((style) => {
      let link = win.document.createElement("link");
      link.setAttribute("rel", "stylesheet");
      link.setAttribute("type", "text/css");
      link.setAttribute("href", style);
      win.document.getElementsByTagName("head")[0].appendChild(link);
    });
  }
  
  const VueHtmlToPaper = {
    install(app, options = {}) {
      app.config.globalProperties.$htmlToPaper = (
        el,
        localOptions,
        cb = () => true
      ) => {
        let 
          defaultStyles = [];
        let {
          styles = defaultStyles
        } = options;
  
        // If has localOptions
        // TODO: improve logic
        if (localOptions) {
          if (localOptions.styles) styles = localOptions.styles;
        }
  
        const element = window.document.getElementById(el);
  
        if (!element) {
          alert(`Element to print #${el} not found!`);
          return;
        }
  
        var ifprint = document.createElement("iframe");
        document.body.appendChild(ifprint);
        ifprint.setAttribute("style","height:0;width:0;");

        const win = ifprint.contentWindow;
  
        win.document.write(`
          <html>
            <head>
              <title>${window.document.title}</title>
            </head>
            <body>
              ${element.innerHTML}
            </body>
          </html>
        `);
  
        addStyles(win, styles);
        
  
        setTimeout(() => {
          win.document.close();
          win.focus();
          win.print();
          win.close();
          document.body.removeChild(ifprint);
          cb();
        }, 1);
  
        return true;
      };
    }
  };
  
  export default VueHtmlToPaper;

于 2021-05-07T08:42:24.327 回答