我必须为支付网关使用两个外部脚本。

现在两者都放在index.html文件中。

但是,我不想在开头本身就加载这些文件。

只有在用户打开特定组件(使用路由器视图)时才需要支付网关。

有办法实现这个目标吗?

谢谢。


当前回答

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)
                }
            })
        },
    },
}

其他回答

最简单的解决方案是将脚本添加到vue-project的index.html文件中

index . html:

<!DOCTYPE html>
<html lang="en">
   <head>
      <meta charset="utf-8">
      <title>vue-webpack</title>
   </head>
   <body>
      <div id="app"></div>
      <!-- start Mixpanel --><script type="text/javascript">(function(c,a){if(!a.__SV){var b=window;try{var d,m,j,k=b.location,f=k.hash;d=function(a,b){return(m=a.match(RegExp(b+"=([^&]*)")))?m[1]:null};f&&d(f,"state")&&(j=JSON.parse(decodeURIComponent(d(f,"state"))),"mpeditor"===j.action&&(b.sessionStorage.setItem("_mpcehash",f),history.replaceState(j.desiredHash||"",c.title,k.pathname+k.search)))}catch(n){}var l,h;window.mixpanel=a;a._i=[];a.init=function(b,d,g){function c(b,i){var a=i.split(".");2==a.length&&(b=b[a[0]],i=a[1]);b[i]=function(){b.push([i].concat(Array.prototype.slice.call(arguments,
         0)))}}var e=a;"undefined"!==typeof g?e=a[g]=[]:g="mixpanel";e.people=e.people||[];e.toString=function(b){var a="mixpanel";"mixpanel"!==g&&(a+="."+g);b||(a+=" (stub)");return a};e.people.toString=function(){return e.toString(1)+".people (stub)"};l="disable time_event track track_pageview track_links track_forms track_with_groups add_group set_group remove_group register register_once alias unregister identify name_tag set_config reset opt_in_tracking opt_out_tracking has_opted_in_tracking has_opted_out_tracking clear_opt_in_out_tracking people.set people.set_once people.unset people.increment people.append people.union people.track_charge people.clear_charges people.delete_user people.remove".split(" ");
         for(h=0;h<l.length;h++)c(e,l[h]);var f="set set_once union unset remove delete".split(" ");e.get_group=function(){function a(c){b[c]=function(){call2_args=arguments;call2=[c].concat(Array.prototype.slice.call(call2_args,0));e.push([d,call2])}}for(var b={},d=["get_group"].concat(Array.prototype.slice.call(arguments,0)),c=0;c<f.length;c++)a(f[c]);return b};a._i.push([b,d,g])};a.__SV=1.2;b=c.createElement("script");b.type="text/javascript";b.async=!0;b.src="undefined"!==typeof MIXPANEL_CUSTOM_LIB_URL?
         MIXPANEL_CUSTOM_LIB_URL:"file:"===c.location.protocol&&"//cdn.mxpnl.com/libs/mixpanel-2-latest.min.js".match(/^\/\//)?"https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js":"//cdn.mxpnl.com/libs/mixpanel-2-latest.min.js";d=c.getElementsByTagName("script")[0];d.parentNode.insertBefore(b,d)}})(document,window.mixpanel||[]);
         mixpanel.init("xyz");
      </script><!-- end Mixpanel -->
      <script src="/dist/build.js"></script>
   </body>
</html>

如果你正在使用Vue 3和Composition API(我强烈推荐),并且你经常使用<script>标记,你可以为它写一个“composable”函数:

import { onMounted } from "vue";

export const useScript = (src, async = false, defer = false) => {
  onMounted(() => {
    // check if script already exists
    if (document.querySelector(`head script[src="${src}"`)) return;

    // add tag to head
    const tag = document.createElement("script");
    tag.setAttribute("src", src);
    if (async) tag.setAttribute("async", "");
    if (defer) tag.setAttribute("defer", "");
    tag.setAttribute("type", "text/javascript");
    document.head.append(tag);
  });
};

或者,如果你正在使用VueUse(我也强烈推荐),你可以使用他们现有的useScriptTag函数。

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

你可以加载你需要的基于承诺的解决方案的脚本:

export default {
  data () {
    return { is_script_loading: false }
  },
  created () {
    // If another component is already loading the script
    this.$root.$on('loading_script', e => { this.is_script_loading = true })
  },
  methods: {
    load_script () {
      let self = this
      return new Promise((resolve, reject) => {

        // if script is already loading via another component
        if ( self.is_script_loading ){
          // Resolve when the other component has loaded the script
          this.$root.$on('script_loaded', resolve)
          return
        }

        let script = document.createElement('script')
        script.setAttribute('src', 'https://www.google.com/recaptcha/api.js')
        script.async = true
        
        this.$root.$emit('loading_script')

        script.onload = () => {
          /* emit to global event bus to inform other components
           * we are already loading the script */
          this.$root.$emit('script_loaded')
          resolve()
        }

        document.head.appendChild(script)

      })

    },
  
    async use_script () {
      try {
        await this.load_script()
        // .. do what you want after script has loaded
      } catch (err) { console.log(err) }

    }
  }
}

请注意这一点。$root有点粗糙,对于全局事件,您应该使用vuex或甚至enthub解决方案。

你可以把上面的内容变成一个组件,并在任何需要的地方使用它,它只会在使用时加载脚本。

注意:这是一台Vue 2。基于X的解。Vue 3已停止支持$on。

我下载了一些HTML模板,附带自定义js文件和jquery。我必须将这些js附加到我的应用程序,并继续使用Vue。

发现这个插件,它是一个干净的方式来添加外部脚本通过CDN和静态文件 https://www.npmjs.com/package/vue-plugin-load-script

// local files
// you have to put your scripts into the public folder. 
// that way webpack simply copy these files as it is.
Vue.loadScript("/js/jquery-2.2.4.min.js")

// cdn
Vue.loadScript("https://maps.googleapis.com/maps/api/js")