What is inline Javascript?

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The inline JS function is a type of filter that minimizes the request numbers made by the user through the web page.
This request is made by the user by inserting the small text from the external source into the document of HTML.
Inline JS function helps the coder to minimize the time to display the content to the applicant or the user especially when they are using old browser that is not so much efficient.

When the coder enables the inline JS filter in the code, the data entered through the external side is directly written on the HTML document and the browsers do not request the Js to run the query. This is the only main point because of which the inline JS filter shortens the browser responding time.

Risk Associated with the inline JS filter

The inline JS filter does not carry the huge risk.
In most of the cases, the inline JS filter is safe and does not disturb the other codes and scripts at all.
There is only one risk associated with the inline JS filter that is, it may break the script that work with DOM for looking their own tags and other tags.
The inline JS filter will not accept the inline script that consist of both inline data and the src attribute.
So the coders should be aware of this and must avoid such cases to run the code in a good way.

It is a fact that inline JS filter is very sensitive to the “AvoidRenamingIntrospectiveJavascript”. For an instance, the Js file with “document.getElementsByTagName('script')” will not be filtered.

Requirements for inline JS filter

There is always an adjustment between the cacheability and the request especially, if the external Js directly falls into the HTML then, it avoid extra requests to call the Js. In some cases, if the Js file is too large and it is not updated bythe developer on regular basis then it is important that it should be placed separately from the HTML file so that the browser can cache the large file.

Thus the inline JS filter will be applicable only on the file that has some size limitations and these can be adjusted using other Js functions.
In case, if the script written by the developer contains both the inline content and the src attribute then it is for sure that the browser will load the external input at the src attribute and the inline script will not work anymore.

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