check if compiled contract present before doing stuff

src/app/tabs/compile-tab.js

@@ -286,6 +286,7 @@ function compileTab (container, appAPI, appEvents, opts) {
 
     function details () {
       var select = el.querySelector('select')
+      if (select.children.length > 0 && select.selectedIndex >= 0) {
         var contractName = select.children[select.selectedIndex].innerText
         var details = contractsDetails[contractName]
         var keys = Object.keys(contractsDetails[contractName])
@@ -296,9 +297,11 @@ function compileTab (container, appAPI, appEvents, opts) {
         })
         modalDialog(contractName, log, {label: 'OK'}, {label: ''})
       }
+    }
 
     function publish (appAPI) {
       var selectContractNames = document.querySelector(`.${css.contractNames.classNames[0]}`)
+      if (selectContractNames.children.length > 0 && selectContractNames.selectedIndex >= 0) {
         var contract = contractsDetails[selectContractNames.children[selectContractNames.selectedIndex].innerText]
         publishOnSwarm(contract, appAPI, function (err) {
           if (err) {
@@ -308,6 +311,7 @@ function compileTab (container, appAPI, appEvents, opts) {
           }
         })
       }
+    }
     return el
   }
 }

src/app/tabs/run-tab.js

@@ -231,7 +231,7 @@ function contractDropdown (appAPI, appEvents, instanceContainer) {
 
   function setInputParamsPlaceHolder () {
     createButtonInput.value = ''
-    if (appAPI.getContracts()) {
+    if (appAPI.getContracts() && selectContractNames.selectedIndex >= 0 && selectContractNames.children.length > 0) {
       var contract = appAPI.getContracts()[selectContractNames.children[selectContractNames.selectedIndex].innerText]
       var ctrabi = txHelper.getConstructorInterface(contract.interface)
       if (ctrabi.inputs.length) {