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Node.js – v8.cachedDataVersionTag() Method
The v8.cacheddataVersionTag() will return an integer value that will represent the version tag of the v8 version, commnad-line flags and the detected CPU features. This method can be useful while determining whether the vm.script cachedBuffer is compatible with this v8 instance or not.
Syntax
v8.cachedDataVersionTag()
Parameters
Since it returns the version, it does not need any special input parameters.
Example 1
Create a file with the name "cachedDataVersionTag.js" and copy the below code snippet. After creating file use the command "node cachedDataVersionTag.js" to run this code.
// v8.cachedDataVersionTag() Demo Example
// Importing the v8 module
const v8 = require('v8');
// Printing the v8.cachedDataVersionTag()
console.log('The cachedDataVersion is: ',v8.cachedDataVersionTag());Output
C:\home
ode>> node cachedDataVersionTag.js The cachedDataVersion is : 4151506697
Example 2:
Let’s have a look at one more example:
// v8.cachedDataVersionTag() Demo Example
// Importing the v8 module
const v8 = require('v8');
// Printing the v8.cachedDataVersionTag()
console.log('The cachedDataVersion is: ',v8.cachedDataVersionTag());
// The below value is derived from the version,
// command-line flags and detected CPU features.
// Therefore these values will update when flags are toggled
v8.setFlagsFromString('--allow_natives_syntax');
console.log("cachedDataVersion after native syntax -- ", v8.cachedDataVersionTag());Output
C:\home
ode>> node cachedDataVersionTag.js The cachedDataVersion is: 4151506697 cachedDataVersion after native syntax -- 3104455477
The cachedDataVersionTag represents the versionTag for V8 version, command-line flags, and detected CPU features. It will change when the flags are toggled inside. We can toggle different flags and will get updated values for each flag changed.
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