[javascript] Why does JavaScript only work after opening developer tools in IE once?

If you are using AngularJS version 1.X you could use the $log service instead of using console.log directly.

Simple service for logging. Default implementation safely writes the message into the browser's console (if present).

https://docs.angularjs.org/api/ng/service/$log

So if you have something similar to

angular.module('logExample', [])
  .controller('LogController', ['$scope', function($scope) {
    console.log('Hello World!');
 }]);

you can replace it with

angular.module('logExample', [])
  .controller('LogController', ['$scope', '$log', function($scope, $log) {
    $log.log('Hello World!');
 }]);

Angular 2+ does not have any built-in log service.

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