Make JS client case sensitive wrt. reserved words (#8905)

Fixes #8904

docs/generators/javascript.md

@@ -64,9 +64,16 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 ## RESERVED WORDS
 
 <ul class="column-ul">
+<li>Array</li>
+<li>Date</li>
+<li>Infinity</li>
+<li>Math</li>
+<li>NaN</li>
+<li>Number</li>
+<li>Object</li>
+<li>String</li>
 <li>abstract</li>
 <li>arguments</li>
-<li>array</li>
 <li>boolean</li>
 <li>break</li>
 <li>byte</li>
@@ -76,7 +83,6 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>class</li>
 <li>const</li>
 <li>continue</li>
-<li>date</li>
 <li>debugger</li>
 <li>default</li>
 <li>delete</li>
@@ -94,27 +100,22 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>for</li>
 <li>function</li>
 <li>goto</li>
-<li>hasownproperty</li>
+<li>hasOwnProperty</li>
 <li>if</li>
 <li>implements</li>
 <li>import</li>
 <li>in</li>
-<li>infinity</li>
 <li>instanceof</li>
 <li>int</li>
 <li>interface</li>
-<li>isfinite</li>
-<li>isnan</li>
-<li>isprototypeof</li>
+<li>isFinite</li>
+<li>isNaN</li>
+<li>isPrototypeOf</li>
 <li>let</li>
 <li>long</li>
-<li>math</li>
-<li>nan</li>
 <li>native</li>
 <li>new</li>
 <li>null</li>
-<li>number</li>
-<li>object</li>
 <li>package</li>
 <li>private</li>
 <li>protected</li>
@@ -123,20 +124,19 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>return</li>
 <li>short</li>
 <li>static</li>
-<li>string</li>
 <li>super</li>
 <li>switch</li>
 <li>synchronized</li>
 <li>this</li>
 <li>throw</li>
 <li>throws</li>
-<li>tostring</li>
+<li>toString</li>
 <li>transient</li>
 <li>true</li>
 <li>try</li>
 <li>typeof</li>
 <li>undefined</li>
-<li>valueof</li>
+<li>valueOf</li>
 <li>var</li>
 <li>void</li>
 <li>volatile</li>