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Identify Map correctly (#1972)
Using Google bigquery I found that your code was comparing the result of `typeof` with a variable named `undefined`. As typeof returns a string it should compare to a string with the content `'undefined'`
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@ -32,7 +32,7 @@
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var showdomButton = uDom.nodeFromId('showdom');
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// Don't bother if the browser is not modern enough.
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if ( typeof Map === undefined || Map.polyfill || typeof WeakMap === undefined ) {
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if ( typeof Map === 'undefined' || Map.polyfill || typeof WeakMap === 'undefined' ) {
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showdomButton.classList.add('disabled');
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return;
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}
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