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new web worker (via ejohn.org)

var worker = new Worker("worker.js");
// Watch for messages from the worker
worker.onmessage = function(e){
  // The message from the client:
  e.data
};

worker.postMessage("start");

/*===========
  The Client:
  ===========*/

onmessage = function(e){
  if ( e.data === "start" ) {
    // Do some computation
    done()
  }
};
function done(){
  // Send back the results to the parent page
  postMessage("done");
}
https://snipt.net/embed/9c57255e4e900f6a391c925279b5e4ae/
/raw/9c57255e4e900f6a391c925279b5e4ae/
9c57255e4e900f6a391c925279b5e4ae
js
JavaScript
23
2019-07-21T12:57:21
True
False
False
/api/public/snipt/7088/
new-web-worker-via-ejohnorg
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="kd">var</span> <span class="nx">worker</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Worker</span><span class="p">(</span><span class="s2">&quot;worker.js&quot;</span><span class="p">);</span> </span><span id="L-2"><a name="L-2"></a><span class="c1">// Watch for messages from the worker</span> </span><span id="L-3"><a name="L-3"></a><span class="nx">worker</span><span class="p">.</span><span class="nx">onmessage</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">e</span><span class="p">){</span> </span><span id="L-4"><a name="L-4"></a> <span class="c1">// The message from the client:</span> </span><span id="L-5"><a name="L-5"></a> <span class="nx">e</span><span class="p">.</span><span class="nx">data</span> </span><span id="L-6"><a name="L-6"></a><span class="p">};</span> </span><span id="L-7"><a name="L-7"></a> </span><span id="L-8"><a name="L-8"></a><span class="nx">worker</span><span class="p">.</span><span class="nx">postMessage</span><span class="p">(</span><span class="s2">&quot;start&quot;</span><span class="p">);</span> </span><span id="L-9"><a name="L-9"></a> </span><span id="L-10"><a name="L-10"></a><span class="cm">/*===========</span> </span><span id="L-11"><a name="L-11"></a><span class="cm"> The Client:</span> </span><span id="L-12"><a name="L-12"></a><span class="cm"> ===========*/</span> </span><span id="L-13"><a name="L-13"></a> </span><span id="L-14"><a name="L-14"></a><span class="nx">onmessage</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">e</span><span class="p">){</span> </span><span id="L-15"><a name="L-15"></a> <span class="k">if</span> <span class="p">(</span> <span class="nx">e</span><span class="p">.</span><span class="nx">data</span> <span class="o">===</span> <span class="s2">&quot;start&quot;</span> <span class="p">)</span> <span class="p">{</span> </span><span id="L-16"><a name="L-16"></a> <span class="c1">// Do some computation</span> </span><span id="L-17"><a name="L-17"></a> <span class="nx">done</span><span class="p">()</span> </span><span id="L-18"><a name="L-18"></a> <span class="p">}</span> </span><span id="L-19"><a name="L-19"></a><span class="p">};</span> </span><span id="L-20"><a name="L-20"></a><span class="kd">function</span> <span class="nx">done</span><span class="p">(){</span> </span><span id="L-21"><a name="L-21"></a> <span class="c1">// Send back the results to the parent page</span> </span><span id="L-22"><a name="L-22"></a> <span class="nx">postMessage</span><span class="p">(</span><span class="s2">&quot;done&quot;</span><span class="p">);</span> </span><span id="L-23"><a name="L-23"></a><span class="p">}</span> </span></pre></div> </td></tr></table>
"john ressig", "web worker", worker