Node.js script.createCachedData() Method Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report The script.createCachedData() method is an inbuilt application programming interface of script module which is used to create a code cache that can be used with the cachedData option of the script constructor. It can be called at any time and any number of times.Syntax: script.createCachedData() Parameters: This method doesn't accept any parameters.Return Value: It returns buffer.Below examples illustrate the use of script.createCachedData() method in Node.js:Example 1: javascript // Node.js program to demonstrate the // script.createCachedData() method // Including vm module const vm = require("vm"); // Constructing script and defining a // function add inside it const script = new vm.Script(` function add(a, b) { return a + b; } const x = add(1, 2); `); // Calling createCachedData without caching // the variable x used above const cacheWithoutx = script.createCachedData(); console.log(cacheWithoutx); Output: <Buffer b5 03 de c0 8a f4 d4 f4 3f 00 00 00 ff 03 00 00 d5 a2 f5 b7 06 00 00 00 00 00 00 00 28 02 00 00 af 79 f4 0d a0 8c bf b8 00 00 00 80 20 0000 80 00 03 ... > Example 2: javascript // Node.js program to demonstrate the // script.createCachedData() method // Including vm module const vm = require("vm"); // Constructing script and defining a // function add inside it const script = new vm.Script(` function add(a, b) { return a + b; } const x = add(1, 2); `); // Calling runInThisContext method script.runInThisContext(); // Calling createCachedData with caching // the variable x used above const cacheWithx = script.createCachedData(); console.log(cacheWithx); Output: <Buffer b5 03 de c0 8a f4 d4 f4 3f 00 00 00 ff 03 00 00 d5 a2 f5 b7 06 00 00 00 00 00 00 00 00 03 00 00 03 67 df 75 6d 4c 36 07 00 00 00 80 20 0000 80 38 04 ... > Reference: https://nodejs.org/api/vm.html#vm_script_createcacheddata Comment More infoAdvertise with us N nidhi1352singh Follow Improve Article Tags : Web Technologies Node.js Node.js-crypto-module Similar Reads Node.js cipher.final() Method The cipher.final() method in Node.js is used to signal to the cipher object that the encryption or decryption process is complete. 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