javascript - 如何从input = File更改javascript中文件的名称(How to change name of file in javascript from input=File)

Question

I need to change the filename (not the file, just the metadata of the name) when uploading to a sharepoint site.(上传到共享点站点时，我需要更改文件名（而不是文件，只是名称的元数据）。)

I figured that it would be easy enough to change the html attribute in javascript rather than playing with Sharepoint backend.(我认为更改javascript中的html属性比使用Sharepoint后端要容易得多。) So that when I upload a file it changes the name of the file (not the data)(这样，当我上传文件时，它会更改文件名（而不是数据）) something like this:(像这样的东西：) function PreSaveAction(){ var file = document.GetElementById('fileupload1'); file.files[0].name='ChangedName.tmp' return true; } Is this impossible due to the nature of the locked input='file' attributes?(由于锁定的input ='file'属性的性质，这是否不可能？)   ask by michael translate from so

Answer 1

try this:(尝试这个：)

var element = document.GetElementById('fileupload1'); var file = element.files[0]; var blob = file.slice(0, file.size, 'image/png'); newFile = new File([blob], 'name.png', {type: 'image/png'}); note: this is for a image type, you have to change this type with type you're actually using.(注意：这是针对图像类型的，您必须使用实际使用的类型来更改此类型。)