把PDF预览改为不渲染html的模式

src/App.vue

@@ -172,6 +172,7 @@ export default {
       startTime: null,
       scale: 2, // 缩放比例
       borderSize: 9, // viewerContainer容器border大小
+      shouldRenderHtml: false, // pdf预览时是否需要渲染成html
       pageSize: 1,
       selected: 2,
       pdfUrl: "",
@@ -227,15 +228,17 @@ export default {
         viewport
       );
       this.renderCanvas(bufferCanvas, viewport, page);
-      let textContent = await page.getTextContent();
-      this.renderHtml(
-        textLayerDiv,
-        page,
-        scale,
-        viewport,
-        bodyHeight,
-        textContent
-      );
+      if (this.shouldRenderHtml) {
+        let textContent = await page.getTextContent();
+        this.renderHtml(
+          textLayerDiv,
+          page,
+          scale,
+          viewport,
+          bodyHeight,
+          textContent
+        );
+      }
     },
     initPage(page, viewport) {
       $("#page").css("height", $("body").height() - $(".toolbar").height());