I'm seeing this claim all over this sub-thread and I will stick up for JS here.

While yes, PHP begun as a collection of macros and was never intended to be a programming language, JS was made by someone with intention. To quote from wiki,

> [Eich] originally joined intending to put Scheme "in the browser", but his Netscape managers insisted that the language's syntax resemble that of Java. As a result, Eich devised a language that had much of the functionality of Scheme, the object-orientation of Self, and the syntax of Java.

I've seen quotes before from Eich himself I believe that he was combining these influences at the time - Scheme's closures, Self's prototypes. It didn't "just happen".