解决这个问题的一个简单而有效的方法是将外部脚本添加到组件的vue mounted()中。我将用谷歌Recaptcha脚本为您演示:

<template>
   .... your HTML
</template>

<script>
  export default {
    data: () => ({
      ......data of your component
    }),
    mounted() {
      let recaptchaScript = document.createElement('script')
      recaptchaScript.setAttribute('src', 'https://www.google.com/recaptcha/api.js')
      document.head.appendChild(recaptchaScript)
    },
    methods: {
      ......methods of your component
    }
  }
</script>

来源:https://medium.com/@lassiuosukainen how-to-include-a-script-tag-on-a-vue-component-fe10940af9e8

使用webpack和vue加载器，你可以这样做

在创建组件之前，它会等待外部脚本加载，因此在组件中可以使用globar vars等

components: {
 SomeComponent: () => {
  return new Promise((resolve, reject) => {
   let script = document.createElement('script')
   script.onload = () => {
    resolve(import(someComponent))
   }
   script.async = true
   script.src = 'https://maps.googleapis.com/maps/api/js?key=APIKEY&libraries=places'
   document.head.appendChild(script)
  })
 }
},

这可以像这样简单地完成。

  created() {
    var scripts = [
      "https://cloudfront.net/js/jquery-3.4.1.min.js",
      "js/local.js"
    ];
    scripts.forEach(script => {
      let tag = document.createElement("script");
      tag.setAttribute("src", script);
      document.head.appendChild(tag);
    });
  }

来自mejiamanuel57的答案很好，但我想添加几个适合我的技巧(我花了几个小时在上面)。首先，我需要使用“窗口”范围。此外，如果您需要访问“onload”函数内的任何Vue元素，则需要为“this”实例创建一个新变量。

<script>
import { mapActions } from "vuex";
export default {
  name: "Payment",
  methods: {
    ...mapActions(["aVueAction"])
  },
  created() {
    let paywayScript = document.createElement("script");
    let self = this;
    paywayScript.onload = () => {
      // call to Vuex action.
      self.aVueAction();
      // call to script function
      window.payway.aScriptFunction();
    };
    // paywayScript.async = true;
    paywayScript.setAttribute(
      "src",
      "https://api.payway.com.au/rest/v1/payway.js"
    );
    document.body.appendChild(paywayScript);
  }
};
</script>

我在Vue 2.6上使用它。这里有一个关于“let self = this;”在Javascript中如何工作的技巧的解释:

var that = this;在JavaScript中是什么意思?

我发现一个快速简单的方法是这样的:

<template>
    <div>Some HTML</div>
    <component
        src="https://unpkg.com/flowbite@1.5.3/dist/flowbite.js"
        :is="'script'"
    ></component>
</template>

好吧，这是我在qiokian(一个live2d动画人物vuejs组件)中的实践:

(以下来自src/qiokian.vue文件)

<script>
export default {
    data() {
        return {
            live2d_path:
                'https://cdn.jsdelivr.net/gh/knowscount/live2d-widget@latest/',
            cdnPath: 'https://cdn.jsdelivr.net/gh/fghrsh/live2d_api/',
        }
    },
<!-- ... -->
        loadAssets() {
            // load waifu.css live2d.min.js waifu-tips.js
            if (screen.width >= 768) {
                Promise.all([
                    this.loadExternalResource(
                        this.live2d_path + 'waifu.css',
                        'css'
                    ),
<!-- ... -->
        loadExternalResource(url, type) {
            // note: live2d_path parameter should be an absolute path
            // const live2d_path =
            //   "https://cdn.jsdelivr.net/gh/knowscount/live2d-widget@latest/";
            //const live2d_path = "/live2d-widget/";
            return new Promise((resolve, reject) => {
                let tag

                if (type === 'css') {
                    tag = document.createElement('link')
                    tag.rel = 'stylesheet'
                    tag.href = url
                } else if (type === 'js') {
                    tag = document.createElement('script')
                    tag.src = url
                }
                if (tag) {
                    tag.onload = () => resolve(url)
                    tag.onerror = () => reject(url)
                    document.head.appendChild(tag)
                }
            })
        },
    },
}