javascript - When I get the cookie, it is null -

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i want cookies have setted, when use console.log(document.cookie), value null.why? code:

document.cookie="name=hi";  document.cookie="displayname=hello";  var strcookie=document.cookie;  console.log(strcookie); //output  ''
enter image description here why? query relevant information, dont's find solution of problem.can me? thank you!


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