uni-app中使用onlyoffice遇到DocsAPI is not defined

在uni-app中导入了onlyoffic，但是启动时报错> DocsAPI is not defined

<template>  
    <div id="monitorOffice"></div>  
</template>  
<script>  
    import { handleDocType } from '@/common/util.js'  
    export default {  
        data() {  
            return { doctype: '', DocEditor: null, script: null }  
        },  
        onLoad(e) {  
            let script = document.createElement('script')  
            script.type = 'text/javascript'  
            script.src = 'http://ip:port/web-apps/apps/api/documents/api.js'  
            document.head.appendChild(script)  

            if (this.DocEditor !== null) {  
                this.DocEditor.destroyEditor()  
            }  
            let filePath = JSON.parse(e.item).filePath  
            let fileType = filePath.substring(filePath.lastIndexOf('.') + 1)  
            let config = {  
                'editorConfig': {  
                    'lang': 'zh',  
                    'mode': 'view',  
                    'region': 'zh_CN',  
                    'customization': {  
                        'chat': false,  
                        'comments': false,  
                        'zoom': 150,  
                    },  
                },  
                'document': {  
                    'fileType': handleDocType(fileType),  
                    'key': filePath,  
                    'title': '体检报告',  
                    'url': filePath  
                },  
                'documentType': handleDocType(fileType),  
                'events': {  
                    onError: function(event) {  
                        console.log('当前文件格式可能不支持在线查看，请尝试下载后本地打开查看。')  
                    }  
                },  
                width: '100%',  
                height: '100%'  
            }  
            let docsEditor = new DocsAPI.DocEditor('monitorOffice', config)  
        },  

        methods: {}  

    }  
</script>  

启动后访问这个页面直接报错：
[system]ReferenceError: DocsAPI is not defined
at VueComponent.onLoad (webpack-internal:///ppe8:47:22)
at invokeWithErrorHandling (http://localhost:8080/static/js/chunk-vendors.js:3275:26)
at VueComponent.push.4UNb.Vue.__call_hook (http://localhost:8080/static/js/chunk-vendors.js:10023:17)
at r (http://localhost:8080/static/js/chunk-vendors.js:13559:369161)
at a (http://localhost:8080/static/js/chunk-vendors.js:13559:369739)
at VueComponent.created (http://localhost:8080/static/js/chunk-vendors.js:13559:9092)
at invokeWithErrorHandling (http://localhost:8080/static/js/chunk-vendors.js:3275:57)
at callHook (http://localhost:8080/static/js/chunk-vendors.js:5681:7)
at VueComponent.Vue._init (http://localhost:8080/static/js/chunk-vendors.js:6466:23)
at new VueComponent (http://localhost:8080/static/js/chunk-vendors.js:6612:12)