前言：其实本来是要做全类型文件预览的，但是一直找不到合适的doc,xlx,ppt预览插件。要是有可以使用的，可以评论推荐给我

我使用的node版本：v18.19.1

参考官网：preview 文件预览 | ran

引入方式：

//安装组件
npm install ranui --save
//在需要的页面引入即可
import 'ranui/button';
import 'ranui/preview';
import 'ranui/style';
//使用方式<div class="preview-container"><div id="showPreview" class="preview"></div><r-preview :src="url" closeable="false"></r-preview>
</div>

我这里多了个showPreview用来处理ppt的预览，因为他原生的ppt预览是增加一个弹窗，我需要当前页面展示，样式不符合要求，我就修改了,\node_modules\ranui\dist\components\preview\index.js  里对应第一个文件

修改如下：

var __defProp = Object.defineProperty;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __publicField = (obj, key, value) => {__defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);return value;
};
import { n as noop } from "./index-7913ec46.js";
import "./index-7216d6b0.js";
import { m as message } from "./index-0d5b9435.js";
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const index$2 = "";
const { warning = noop } = message;
const PPTX = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
const PDF = "application/pdf";
const DOCX = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
const XLSX = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
const XLS = "application/vnd.ms-excel";
async function Custom() {if (typeof document !== "undefined" && !customElements.get("r-preview") && true) {const { renderPptx } = await import("./index-7b8840f9.js");const { renderDocx } = await import("./docx-c5d02d8c.js");const { renderPdf } = await import("./pdf-bdb7818a.js");const { renderExcel } = await import("./index-c14450a9.js");const requestUrlToBuffer = (src, options) => {if (typeof XMLHttpRequest === "undefined") {throw new Error("XMLHttpRequest is not defined");}if (typeof document === "undefined") {return Promise.reject("document is not defined");}return new Promise(function(resolve, reject) {const xhr = new XMLHttpRequest();xhr.open(options.method || "GET", src, true);xhr.responseType = options.responseType || "arraybuffer";xhr.onload = function() {if (xhr.status === 200) {resolve({ success: true, data: xhr.response, message: "" });} else {reject({success: false,data: xhr.status,message: `The request status is${xhr.status}`});}};xhr.onerror = function(e) {reject({ success: false, data: e, message: `` });};xhr.onprogress = (event) => {options.onProgress && options.onProgress(event);};xhr.withCredentials = options.withCredentials || false;if (options.headers) {Object.keys(options.headers).forEach(function(key) {(options == null ? void 0 : options.headers) && xhr.setRequestHeader(key, options.headers[key]);});}xhr.send(options.body);});};const renderPpt = (file, dom) => {return new Promise((resolve, reject) => {const reader = new FileReader();reader.readAsArrayBuffer(file);reader.onload = () => {var _a;if (reader.result && dom) {const param = {pptx: reader.result,resultElement: dom};(_a = renderPptx(param)) == null ? void 0 : _a.then(() => {resolve();});}};reader.onerror = (error) => {reject(error);};reader.onabort = (abort) => {reject(abort);};});};const renderWord = (file, dom) => {return Promise.resolve().then(() => renderDocx({ buffer: file, bodyContainer: dom }));};const renderFileMap = /* @__PURE__ */ new Map([[PDF, renderPdf],[PPTX, renderPpt],[DOCX, renderWord],[XLSX, renderExcel],[XLS, renderExcel]]);class CustomElement extends HTMLElement {constructor() {super();__publicField(this, "_loadingText");__publicField(this, "preview");__publicField(this, "previewContext");__publicField(this, "_slot");__publicField(this, "_div");__publicField(this, "_loadingElement");__publicField(this, "createLoading", () => {this._loadingElement = document.createElement("div");this._loadingElement.setAttribute("class", "r-preview-loading");const icon = document.createElement("r-icon");icon.setAttribute("name", "loading");icon.setAttribute("size", "100");icon.setAttribute("color", "#1E90FF");icon.setAttribute("spin", "");this._loadingText = document.createElement("div");this._loadingElement.appendChild(icon);this._loadingText.setAttribute("class", "r-preview-loading-text");this._loadingElement.appendChild(this._loadingText);return this._loadingElement;});__publicField(this, "onProgress", (event) => {const num = event.loaded / event.total * 100;const progress = Math.min(99, num).toFixed(2) + "%";if (this._loadingText && this._loadingElement) {this._loadingText.innerText = `Loading ${progress}`;if (num >= 100) {setTimeout(() => {var _a;(_a = this.preview) == null ? 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void 0 : _a.appendChild(previewContain);this._loadingElement = this.createLoading();this.preview.appendChild(this._loadingElement);document.getElementById('showPreview').appendChild(this.preview);// document.body.appendChild(this.preview);}this.handleFile(this.src);}});this._div = document.createElement("div");this.preview = document.getElementById("r-preview-mask");this._slot = document.createElement("slot");this._div.appendChild(this._slot);this._slot.setAttribute("class", "r-preview-slot");this._div.setAttribute("class", "r-preview");const shadowRoot = this.attachShadow({ mode: "closed" });const F7170EE498E0DD32CBDCB63FBA8F75CC = document.createElement("style");F7170EE498E0DD32CBDCB63FBA8F75CC.textContent = f7170ee498e0dd32cbdcb63fba8f75cc;shadowRoot.appendChild(F7170EE498E0DD32CBDCB63FBA8F75CC);shadowRoot.appendChild(this._div);}static get observedAttributes() {return ["src", "closeable"];}get label() {return this.getAttribute("label");}set label(value) {if (value)this.setAttribute("label", value);}get src() {return this.getAttribute("src");}set src(value) {if (value)this.setAttribute("src", value);}get closeable() {return this.getAttribute("closeable");}set closeable(value) {if (value)this.setAttribute("closeable", value);}connectedCallback() {this.preview = document.getElementById("r-preview-mask");this.addEventListener("click", this.showPreview);}disconnectedCallback() {this.removeEventListener("click", this.showPreview);}attributeChangedCallback(name, oldValue, newValue) {if (newValue !== oldValue) {if (name === "src" && newValue) {this.setAttribute("src", newValue);this.showPreview();}}}}customElements.define("r-preview", CustomElement);}
}
const index = Custom();
const index$1 = /* @__PURE__ */ Object.freeze(/* @__PURE__ */ Object.defineProperty({__proto__: null,default: index
}, Symbol.toStringTag, { value: "Module" }));
export {index as a,index$1 as i
};

以及一点点的样式修改

<style lang="scss">/*deep*/#r-preview-mask{position: static;width: calc(100vw - 230px);/* margin-left: 210px; */height: 100%;&>section{width: 100% !important;}}
</style>

好像是pdf在预览时样式很奇怪：所以pdf我是通过ifream进行预览

 <iframe :src="url" class="pdfBox"></iframe>