文件操作 - engine-v8-version.js
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文件: /node_modules/core-js/internals/engine-v8-version.js
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var global = require('../internals/global'); var userAgent = require('../internals/engine-user-agent'); var process = global.process; var versions = process && process.versions; var v8 = versions && versions.v8; var match, version; if (v8) { match = v8.split('.'); version = match[0] + match[1]; } else if (userAgent) { match = userAgent.match(/Edge\/(\d+)/); if (!match || match[1] >= 74) { match = userAgent.match(/Chrome\/(\d+)/); if (match) version = match[1]; } } module.exports = version && +version;
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