HeNan_HanJia/Code/src/utils/xhrVideo.ts

/**
 *
 * @param src 视频路径
 * @returns Promise - 视频的总长度
 */

export const videoLodingNumFu = (src: string): Promise<number> => {
  return new Promise((resolve, reject) => {
    const req = new XMLHttpRequest()
    req.open('HEAD', src, true)
    req.onreadystatechange = function () {
      if (req.readyState === 4) {
        if (req.status === 200) {
          const contentLength = req.getResponseHeader('Content-Length')
          if (contentLength) {
            const videoLength = parseInt(contentLength, 10)
            resolve(videoLength)
          }
        }
      }
    }
    req.send()
  })
}

export const domDelOwnFu = (classNmae: string) => {
  const dom = document.querySelector(classNmae)
  if (dom) dom.remove()
}