How Can I Reference the Script Tag of the Currently Running JavaScript?

Referencing the Script Tag for the Currently Executing Script

In situations where you need to load scripts dynamically within an existing script, referencing the script tag that loaded the current script becomes necessary. This allows you to append new script tags into the DOM after it.

Approaches

1. Using document.currentScript

document.currentScript returns the script element currently being processed. It's a reliable and simple method. However, it's not supported in older browsers and doesn't work with modules.

2. Selecting the Script by ID

Adding an ID attribute to the script allows you to select it by ID using document.getElementById(). This method is also reliable, but requires modifying the script tag.

3. Selecting the Script by data-* Attribute

Providing the script with a data-* attribute lets you select it using the attribute's value. This is similar to using an ID, but it doesn't suffer from the same potential edge cases.

4. Selecting the Script by Source

Using the src attribute, you can select the script by its source using a selector. This method works on scripts with external sources, but it's not reliable when loading the same script multiple times or in different environments.

5. Looping Over All Scripts

Iterating over all script elements and checking each to find the desired one provides a comprehensive approach that works with older browsers. However, it inherits the benefits and limitations of the selection criteria used.

6. Getting the Last Executed Script

Assuming scripts are executed sequentially, the last script element may be the current script. While simple, this method doesn't work with asynchronous or dynamically inserted scripts.

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