quick guide babel compiler



Assuming that you already have npm installed, you need to get the following components.

npm install babel
npm install babel-cli
npm install babel-preset-es2015

Go ahead and create a new file called polygon.js using the code below -



next, run the following command to generate traditional javascrip (es5 script)

babel --presets es2015 polygon.js --out-file poly.js







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The specified initialization vector (IV) does not match the block size for this algorithm

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If you're getting  exception when trying to assigned key to a symmetric key and getting error message below :- The specified initialization vector (IV) does not match the block size for this algorithm And your code probably look like something below :- Then you need to go into debug mode and start looking into the supported size for IV as shown in diagram below :- As you can see, IV is 16 bytes, so you need to provide 16 bytes. The same goes for Key field too, if you're adding anything to it. As long as you provide a valid key size, then we're good and you're code will be ready.
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