问JavaScript设置。大脑js

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Debugger attached.
/Users/user/Downloads/using-machine-learning-to-determine-light-or-dark/js/index.js:1
(function (exports, require, module, __filename, __dirname) { const input = 
document.querySelector("input")

at Function.Module._load (internal/modules/cjs/loader.js:520:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:719:10)
at startup (internal/bootstrap/node.js:228:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:576:3)
Waiting for the debugger to disconnect...
ReferenceError: document is not defined
index.js:1
at Object.<anonymous> (/Users/user/Downloads/using-machine-learning-to-determine-light-or-dark/js/index.js:1:77)
at Module._compile (internal/modules/cjs/loader.js:675:14)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
at Module.load (internal/modules/cjs/loader.js:589:32)
at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
at Function.Module._load (internal/modules/cjs/loader.js:520:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:719:10)
at startup (internal/bootstrap/node.js:228:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:576:3)