Node.js v8.Deserializer.readHeader() Method

The v8.Deserializer.readHeader() method is an inbuilt application programming interface of the v8.Deserializer module which is used to read the header and validate it, to ensure that contains a valid serialization format version.

Syntax:

v8.Deserializer.readHeader();

Parameters: This method does not accept any parameters.

Return Value: This method reads the header buffer at deserializer and validates it. It returns true on the valid header, otherwise throws an error.

Below examples illustrate the use of v8.Deserializer.readHeader() method in Node.js:

Example 1: Filename: index.js Run index.js file using the following command:

node index.js

Output:

<Buffer >
true
<Buffer >

Example 2: Filename: index.js Run index.js file using the following command:

node index.js

Output:

It is a valid header!

Reference: https://nodejs.org/api/v8.html#v8_deserializer_readheader