fix(js/ts) Prevent while/if/switch from falsly matching as functions

CHANGES.md

@@ -2,6 +2,7 @@
 
 Language Improvements:
 
+- fix(js/ts) Prevent while/if/switch from falsly matching as functions (#2803) [Josh Goebel][]
 - enh(julia) Update keyword lists for Julia 1.x (#2781) [Fredrik Ekre][]
 - enh(python) Match numeric literals per the language reference [Richard Gibson][]
 - enh(ruby) Match numeric literals per language documentation [Richard Gibson][]

src/languages/javascript.js

@@ -359,6 +359,11 @@ export default function(hljs) {
         ],
         illegal: /%/
       },
+      {
+        // prevent this from getting swallowed up by function
+        // since they appear "function like"
+        beginKeywords: "while if switch catch"
+      },
       {
         className: 'function',
         // we have to count the parens to make sure we actually have the correct

test/markup/javascript/class.expect.txt

@@ -19,3 +19,9 @@
   }
   <span class="hljs-function"><span class="hljs-title">onemore</span>(<span class="hljs-params">a=(<span class="hljs-number">3</span>+<span class="hljs-number">2</span>, b=(<span class="hljs-number">5</span>*<span class="hljs-number">9</span>))</span>)</span> {}
 }
+
+<span class="hljs-comment">// these should not be matched as class functions</span>
+<span class="hljs-keyword">while</span>(value) {}
+<span class="hljs-keyword">if</span>(value) {}
+<span class="hljs-keyword">switch</span>(value) {}
+<span class="hljs-keyword">try</span> {} <span class="hljs-keyword">catch</span>(err) {}

test/markup/javascript/class.txt

@@ -19,3 +19,9 @@ class Car extends Vehicle {
   }
   onemore(a=(3+2, b=(5*9))) {}
 }
+
+// these should not be matched as class functions
+while(value) {}
+if(value) {}
+switch(value) {}
+try {} catch(err) {}