A research that analyzed over 10,000 samples of diverse malicious software written in JavaScript concluded that roughly 26% of it is obfuscated to evade detection and analysis.

JScrambler 3 allows developers to obfuscate their source code for mobile and desktop web apps so it’s almost impossible to read.

Jscrambler to provide leading JavaScript web and mobile hybrid application protection against tampering and data theft through sophisticated JavaScript obfuscation, code traps and software self ...

My colleague Daniel Novomeský alerted me to a problem he's observed with the way some web-developers use JavaScript: a few of them have the habit of obfuscating JavaScript code on their web sites ...

Coders can obfuscate any JavaScript code with this technique, the report found, thanks to JavaScript's use of type coercion that converts different data types to ensure operations can be performed.

Since code obfuscation also adds a performance hit, Google argues there are no advantages in using code obfuscation at all, hence the reason to ban such extensions altogether.