控制台输出图片

实现代码

const toBase64 = (url) => {
  return new Promise((resolve) => {
    fetch(url)
      .then(response => response.arrayBuffer())
      .then(data => {
        let base64 = btoa(
          new Uint8Array(data).reduce((value, byte) => {
            return value + String.fromCharCode(byte)
          }, '')
        )
        base64 = 'data:image/png;base64,' + base64
        resolve(base64)
      })
  })
}
(async function () {
  const url = '/favicon.ico'
  const base64 = await toBase64(url)
  console.log('%c %c协同作业管理平台 %c zhenyutsai %c 版本：1.0.0',
        ` padding: 15px 15px;
        background-image: url(${base64});
        background-size: contain;
        background-repeat: no-repeat;
        color: transparent;`,
        'color: #28388f; font-weight: 600; font-size:25px;',
        'background: #35495e; padding: 4px; border-radius: 3px 0 0 3px; color: #fff',
        'background: #41b883; padding: 4px; border-radius: 0 3px 3px 0; color: #fff'
  )
})()

实现效果