一、查找

打开viewer.js

搜索 setTitleUsingUrl定位到代码如图位置

Js插件 之pdf.js修改显示标题_git

 二、修改

setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
    this.url = url;
    try {
      this.setTitle((TITLE=='' || TITLE == undefined)?(decodeURIComponent(getFileName(url)) || url):TITLE);
    } catch (e) {
      // decodeURIComponent may throw URIError,
      // fall back to using the unprocessed url in that case
      this.setTitle(url);
    }
},

TITLE就是你定义的标题,使用方法:

<script>
    var TITLE = 'test';
    DEFAULT_URL = "compressed.tracemonkey-pldi-09.pdf";
    PDFJS.workerSrc = "./pdf/pdf.worker.js"
</script>

三、源码地址

https://gitee.com/yang1015/pdf-reader