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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] < 4 ? 1 : 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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