Add web worker compatibility

js/examples/web/worker.js

@@ -0,0 +1,52 @@
+
+importScripts('./soljson.js');
+importScripts('./resolc.js');
+
+// Handle messages from the main thread
+onmessage = async function (e) {
+  const contractCode = e.data.contractCode
+  const sourceCode = {
+      language: 'Solidity',
+      sources: {
+          contract: {
+              content: contractCode,
+          }
+      },
+      settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+          outputSelection: {
+              '*': {
+                '*': ['abi'],
+            }
+          }
+      }
+  };
+    const m = createRevive();
+
+    m.soljson = Module;
+
+    // Set input data for stdin
+    m.setStdinData(JSON.stringify(sourceCode));
+
+    var stdoutString = "";
+    m.setStdoutCallback(function(char) {
+        if (char.charCodeAt(0) === '\n') {
+            console.log("new line")
+            exit
+        }
+        stdoutString += char;
+    });
+
+    var stderrString = "";
+    m.setStderrCallback(function(char) {
+        stderrString += char;
+    });
+
+    // Compile the Solidity source code
+    m.callMain(['--standard-json']);
+
+  postMessage({output: stdoutString || stderrString});
+};