vue单页面加载js方法

export function loadScript (url: string[]) {
  // 如果是数组
  const promiseList: Array<Promise<any>> = []
  url.forEach((item) => {
    const p = new Promise((resolve, reject) => {
      const script: any = document.createElement('script')
      script.type = 'text/javascript'
      script.src = item
      script.onload = () => {
        script.onload = null
        script.onerror = null
        resolve()
      }
      script.onerror = () => {
        script.onload = null
        script.onerror = null
        reject()
      }
      const head = document.getElementsByTagName('head')[0];
      (head || document.body).appendChild(script)
    })
    promiseList.push(p)
  })
  return Promise.all(promiseList)
}

使用方法：

 loadScript([
      //融云库中的XMLHttpRequest判断在IOS9中有问题IOS9中为object,融云判断的是否为function。2019.10.18
      '/js/libs/RongIMLib-2.3.5.min.js?v2'
    ]).then(() => {
      loadScript([
        '/js/libs/RongEmoji-2.2.7.min.js',
        '/js/libs/Libamr-2.2.5.min.js',
        '/js/libs/RongIMVoice-2.2.6.js'
      ]).then(async () => {
        // do something
      })
    })