主要的知识点是，浏览的paste事件，clipboardData。
paste 一个标准的Dom事件，粘贴事件，会在用户按下Ctrl+v ,或者通过鼠标复制时触发.像其他事件一样，我们可以通过addEventListener为一个Element添加一个粘贴事件的监听函数 如以下代码。
document.addEventListener('paste', (event) => { // 阻止默认事件和冒泡行为 pe.preventDefault() pe.stopPropagation() // 真正的黏贴事件 console.log('粘贴事件', event)});
我使用vue3，在页面初始化的时候，就绑定这个监听事件，全局监听页面上的黏贴事件，然后通过读取内容，将文件上传到服务器中，也支持微信截图上传：
// 图片黏贴上传功能document.addEventListener('paste', (pe) => { pe.preventDefault() pe.stopPropagation() fileList.push(1) console.log('粘贴事件---', pe) var data = pe.clipboardData!.files[0] console.log('fun', data); if (!data) { return } var date = new Date() var reader = new FileReader(); var uploadType = getType(data.type, data) reader.readAsDataURL(data); reader.onload = function (event) { console.log("加載成功-", event); // 用于预览图片 var uploadFileRaw = reactive({ name: data.lastModified + data.name, path: uploadType === 'picture' ? event!.target!.result as string : "", type: uploadType, size: (data.size / 1024 / 1024).toFixed(2).toString() + "M", sha: "", openLink: '', downLink: '', htmlLink: '', creatTime: `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`, selected: false, showTips: false, uploading: true, }) gitFileList.push(uploadFileRaw) // 用于上传图片 fileApi.uploadFile(`${filePath.value}/${data.lastModified + data.name}`, { "message": "Upload From FileHub", "content": (event!.target!.result! as string).split("base64,")[1] }).then((res: any) => { console.log("上传文件返回:", res); if (res.status === 201) { uploadFileRaw.uploading = false uploadFileRaw.path = res.data.content.path uploadFileRaw.sha = res.data.content.sha uploadFileRaw.openLink = uploadType === 'picture' ? `${uStore.fileCdn}${res.data.content.path}` : `${uStore.gitIoCdn}/${res.data.content.path}` uploadFileRaw.downLink = uploadType === 'picture' ? `${uStore.fileCdn}${res.data.content.path}` : `${uStore.gitIoCdn}/${res.data.content.path}` uploadType === 'picture' && imgPreList.push(`${uStore.fileCdn}${res.data.content.path}`) console.log("上传文件结果:", res, imgPreList) } else { ElMessage.error("上传失败:" + res.data.message) gitFileList.splice(gitFileList.indexOf(uploadFileRaw), 1) } upPropress.value = 1 fileList.length = 0 }).catch(error => { uploadFileRaw.sha = 'error' gitFileList.splice(gitFileList.indexOf(uploadFileRaw), 1) console.log("上传文件错误:", error); upPropress.value = 1 fileList.length = 0 }) }})
实际使用效果：
