title: ECMAScript multiple Prologue Directives
body: <p>Certain ECMAScript environments permit switiching into a special mode by means of a Directive Prologue. ECMAScript 5 has "use strict" and others such as <a href="http://asmjs.org/spec/latest/" rel="nofollow" title="asm">asm</a> have their own like "use asm".</p>
  
  <p>The docs on <a href="http://ecma-international.org/ecma-262/5.1/#sec-14.1" rel="nofollow" title="Directive Prologues">Directive Prologues</a> are written in a language that's a little to obtuse for my comprehension level. What is the correct way to construct a Directive Prologue with multiple Directives? My hunch is its:</p>
  
  <pre><code>function(){
    "use foo";
    "use bar";
  }
  </code></pre>
  
  <p>But I'm not sure.</p>