[英]TypeError: fpPromise.then is not a function
我想使用fingerprintjs來獲取設備 ID。 這是 typescript 代碼,如下所示:
const DeviceHandler = {
getDeviceId: async (): Promise<string> => {
return new Promise((resolve, reject) => {
// Initialize an agent at application startup.
const fpPromise = require('@fingerprintjs/fingerprintjs');
// Get the visitor identifier when you need it.
fpPromise
.then((fp: { get: () => any; }) => fp.get())
.then(async (result: { visitorId: any; }) => {
// This is the visitor identifier:
const deviceId = result.visitorId;
resolve(deviceId);
});
});
}
};
export default DeviceHandler;
當我運行這段代碼時,顯示錯誤:
background.js:5253 Uncaught (in promise) TypeError: fpPromise.then is not a function
at background.js:5253:26
at new Promise (<anonymous>)
at background.js:5248:35
at step (background.js:5240:23)
at Object.next (background.js:5221:53)
at background.js:5215:71
at new Promise (<anonymous>)
at background.js:5211:12
at Object.getDeviceId (background.js:5246:39)
at background.js:4811:108
查了一下代碼發現fpPromise
不是null,這是為什么? 如何解決這個問題? fingerprintjs 版本是:
"@fingerprintjs/fingerprintjs": "^3.3.2",
這是在 typescript "ttypescript": "^1.5.13",
中調用這個 function 的方法:
import DeviceHandler from "@utils/data/DeviceHandler";
const deviceId = await DeviceHandler.getDeviceId();
節點版本是v16.13.2
。
使用import()
內聯導入模塊將返回Promise<FingerprintJS>
(因為它是異步的)。 使用require()
內聯導入模塊將直接返回FingerprintJS
(因為它是同步的)。
對於您的應用程序,為了匹配文檔的第一個示例,您應該替換:
// here, fpPromise is a FingerprintJS object - not a Promise!
const fpPromise = require('@fingerprintjs/fingerprintjs');
和
// here, fpPromise is a Promise<Agent> object
const fpPromise = require('@fingerprintjs/fingerprintjs').load();
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