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This article introduces the relevant knowledge of "must JavaScript code be written in the head tag?". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

JavaScript code does not have to be written in head tags; JavaScript code can theoretically be written anywhere, in script tags, script tags are used to define client script, and head tags are used to define the headers of the document and are containers for all header elements.

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

Does JavaScript code have to be written in the head tag?

In theory, it can be written anywhere, including outside the tag.

Usually, you can write functions in between. Those that run directly can be placed either at the HEAD or with the HTML tag. Sometimes, the code that runs directly needs to access the following elements, which can be placed later to ensure that each element already exists in the document.

The tag is used to define the header of the document, which is the container for all header elements. Elements in can reference scripts, tell browsers where to find stylesheets, provide meta-information, and so on.

The header of a document describes a variety of attributes and information about the document, including the title of the document, its location in the Web, and its relationship to other documents. Most of the data contained in the header of the document is not actually displayed to the reader as content.

The following tags can be used in the head section:, and.

Tags are used to define client script, such as JavaScript. The script element can either contain script statements or point to an external script file through the src attribute.

The required type attribute specifies the MIME type of the script. Common applications of JavaScript are image manipulation, form validation, and dynamic content updates.

Examples are as follows:

[xss_clean] ("Hello World!")

Output result:

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