Project environment localhost:8080
process: log in to the callback interface and write it to the token environment with $.cookie (the value obtained by "token",). Take it with $.cookie (" token") on another page, but it"s always undefined. I checked a lot of documents on the Internet. But I use document.cookie to output directly in the console, which can be exported, and then I use a method to output the token in cookie, which can also be output in the console, which is undefined.

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at first I thought it was an environmental problem. I asked the background if there was anything set up, but the background said it was useless. It is also localhost. There is no problem with normal access to my last project