Why is using both `src` and content within a `` tag problematic?

Script Tag with Both src and Content: Explanation and Implications

In the example provided, a script tag includes both a src attribute and content enclosed within the tag itself. While this approach may seem intuitive, it introduces potential browser compatibility issues.

Browser Handling of Script Tags with Both src and Content

Different browsers handle this situation differently:

• Some browsers execute the content only if the src script is included without errors.
• Other browsers execute the content after attempting to include the src script, regardless of its success.

HTML5 Prohibitions and Reliability Issues

This behavior is unreliable and violates HTML5 standards, which advises against including both src and content within a single script tag. As a result, it's generally discouraged to rely on this approach.

Google's Specific Implementation

In the case of Google's 1 button example, the content is an object literal, which doesn't execute any code. Google's JavaScript code examines the contents of the script tag and modifies its behavior accordingly, regardless of whether the src script is included successfully.

Best Practice

To avoid browser compatibility issues and ensure reliable script execution, it's recommended to use either a src attribute or content but not both in the same script tag. For loading external scripts, use the src attribute, while inline scripts should be enclosed within the tag's content.

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