Why Does My JavaScript Only Work After Opening Developer Tools in Internet Explorer?

Unexpected Issue: JavaScript Only Functions After Opening Developer Tools in Internet Explorer

In a puzzling incident, a website experiencing difficulties in Internet Explorer (IE9) found that the problem mysteriously resolved itself once the developer tools were opened. The function in question, a simple password entry for PDF downloads, remained unresponsive in IE until after this seemingly unrelated action.

Upon investigation, it was discovered that the JavaScript code contained debugging instructions like console.log(). The console object activates only when the developer toolbar is open. As a result, the console calls remained inactive until the toolbar was accessed.

To resolve this issue, several approaches are available:

• Remove Debugging Code: The most straightforward solution is to eliminate references to console.log() and other debugging tools from the production code.
• Conditional Wrapping: Code can be wrapped in conditional statements that check the existence of the console object before attempting to use it. For example:

if (console && console.log) {
  console.log('Debug message');
}

By implementing these solutions, developers can ensure that their JavaScript code functions as expected in IE without requiring the user to open the developer tools.

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