do-if-jquery.js

do-if-jquery.js

const detectJQuery = () => typeof jQuery !== 'undefined'

doIf(detectJQuery, main, 1000)

function main() {
	jQuery(($) => {
		// jQuery detected
	})	
}

function doIf(predicate, callback, timeOut) {
  setTimeout(() => {
    if (predicate()) {
      callback()
    }
    else {
      doIf(predicate, callback);
    }        
  }, timeOut)
}