How to print a part of a vue component without losing the style

问题

I want to print some content from a vue component. For example from the following snippet, I would like to print the v-card-text element which also has an id of #print:

new Vue({
  el: '#app',
  data() {
    return {
      dialog: false
    }
  },
  methods: {
    print() {
      var prtContent = document.getElementById("print");
      var WinPrint = window.open('', '', 'left=0,top=0,width=800,height=900,toolbar=0,scrollbars=0,status=0');
      WinPrint.document.write(prtContent.innerHTML);
      WinPrint.document.close();
      WinPrint.focus();
      WinPrint.print();
      WinPrint.close();
    }
  }
})

<!doctype html>
<html>

<head>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/vuetify/1.2.0/vuetify.min.css" />
</head>

<body>
  <div id="app">
    <v-app id="inspire">
      <v-layout row justify-center>
        <v-dialog v-model="dialog" persistent max-width="290">
          <v-btn slot="activator" color="primary" dark>Open Dialog</v-btn>
          <v-card>
            <v-card-title class="headline">Print This:</v-card-title>
            <v-card-text id="print">Lorem ipsum dolor sit amet.</v-card-text>
            <v-card-actions>
              <v-spacer></v-spacer>
              <v-btn color="green darken-1" flat @click.native="print">Print</v-btn>
          </v-card>
        </v-dialog>
      </v-layout>
    </v-app>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/vuetify/1.2.0/vuetify.min.js"></script>
</body>

</html>

However,when I get prompted for the print, all the styles associated with it goes away. How can I print a vue component in such a way so that the components won't lose the associated styles? I recommend to copy the snippet to your local machine for the best effect.

回答1:

You need to copy over the styles from the original document. Try something like this:

// Get HTML to print from element
const prtHtml = document.getElementById('print').innerHTML;

// Get all stylesheets HTML
let stylesHtml = '';
for (const node of [...document.querySelectorAll('link[rel="stylesheet"], style')]) {
  stylesHtml += node.outerHTML;
}

// Open the print window
const WinPrint = window.open('', '', 'left=0,top=0,width=800,height=900,toolbar=0,scrollbars=0,status=0');

WinPrint.document.write(`<!DOCTYPE html>
<html>
  <head>
    ${stylesHtml}
  </head>
  <body>
    ${prtHtml}
  </body>
</html>`);

WinPrint.document.close();
WinPrint.focus();
WinPrint.print();
WinPrint.close();

来源：https://stackoverflow.com/questions/52343006/how-to-print-a-part-of-a-vue-component-without-losing-the-style

标签

javascript

Vue.js

printing