There are not 'document.scripts' in mini-program environment

[janpoem]

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• Search for existing issues: https://github.com/getsentry/sentry-javascript/issues
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Package + Version

• @sentry/browser
• @sentry/node
• raven-js
• raven-node (raven for node)
• @sentry/tracing

Version:

6.4.1

Description

Use '@sentry/tracing' in mini-program environment, when call Sentry.startTransaction on a page launch at the first time, whould catch the error as below:

TypeError: Cannot read property 'length' of undefined
    at MetricsInstrumentation.define.push../node_modules/@sentry/tracing/esm/browser/metrics.js.MetricsInstrumentation.addPerformanceEntries (common.js?t=wechat&s=1623694839553&v=ba7f9072bea7d2c8b9666326b3c638e8:6416)
    at common.js?t=wechat&s=1623694839553&v=ba7f9072bea7d2c8b9666326b3c638e8:6315
    at IdleTransaction.define.push../node_modules/@sentry/tracing/esm/idletransaction.js.IdleTransaction.finish (common.js?t=wechat&s=1623694839553&v=ba7f9072bea7d2c8b9666326b3c638e8:7949)
    at Function.<anonymous> (common.js?t=wechat&s=1623694839553&v=ba7f9072bea7d2c8b9666326b3c638e8:7932)
    at :12319/appservice/<setTimeout callback function>
    at VM214 WAService.js:2
    at VM214 WAService.js:2(env: macOS,mp,1.05.2105170; lib: 2.17.0)

Check this error in file /node_modules/@sentry/tracing/esm/browser/metrics.js:

        // line 34
        if (global.document) {
            // eslint-disable-next-line @typescript-eslint/prefer-for-of
            for (var i = 0; i < document.scripts.length; i++) { // => There are not document.scripts in mini-program
                // We go through all scripts on the page and look for 'data-entry'
                // We remember the name and measure the time between this script finished loading and
                // our mark 'sentry-tracing-init'
                if (document.scripts[i].dataset.entry === 'true') {
                    entryScriptSrc = document.scripts[i].src;
                    break;
                }
            }
        }

I think should change if (global.document) to if (global.document && document.scripts != null) will fix this issue.