Move more types constants to separate variables like strundefined

[FarSeeing]

As typeof undefined is stored in strundefined why not also store other types?

5. g. "object" constant is used 17 times in 10 different files as per commit 203569562414304aabec22fd20b0cb17ad34c7ad

[gibson042]

strundefined was introduced to work around a ​minification issue with UglifyJS that replaced typeof el.domMethod !== "undefined" with e.domMethod!==void 0, which breaks in IE when el is an XML node (see #13315). The issue has since been fixed, so it's worth looking at the effects on output size of comparing typeof output to variables or constants for all cases. Would you like to tackle this, FarSeeing?

[trac-o-bot]

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