Split long string into concatenated assignment (eg. base64 images)

split-chunk.js

const CHUNK_SIZE      = 80;   // put whatever size is relevant here
const CONCAT_OPERATOR = '+'; // put string concatenation operator here

const text   = `Very long text would like to be splitted to fit any clumsy editor at there that does only support fixed number of characters per line`;
const regexp = new RegExp('.{1,'+ CHUNK_SIZE+'}', 'g');
const result = '`' + text.match(regexp).join('` ' + CONCAT_OPERATOR + ' \n`') + '`';

// Result with (CHUNK_SIZE=40 and CONCAT_OPERATOR='&&') is:
//
//  `Very long text would like to be splitted` && 
//  ` to fit any clumsy editor at there that ` && 
//  `does only support fixed number of charac` && 
//  `ters per line`

// Pre-defined scenarios
'`' + text.match(/.{1,80}/g).join('` &&\n`') + '`';  // ABAP Version