<!-- FIND, STYLE AND REPLACE MATCHING STRINGS --> 
<script>
const targetStrings = [
  {
  	selector: 'h2',
    targetString: 'String 1',
    replacementString: 'String 1 replacement',
    appendedClassName: 'class-name-here',
  },
  {
  	selector: 'p',
    targetString: 'String 2',
    replacementString: 'String 1 replacement',
    appendedClassName: 'class-name-here',
  },
]

function wrapAndReplaceMatches(selector, newClass, wordTarget, replacement) {
  const pattern = new RegExp(`\\b(${wordTarget})\\b`, 'gi');
  const hasClassAttr = newClass ? `class=${newClass}` : ''
  const wrapAndReplace = !replacement
  ? `<span ${hasClassAttr}>$1</span>`
  : `<span ${hasClassAttr}>${replacement}</span>`;
  Array.from(document.querySelectorAll(selector)).forEach((element) => {
		element.innerHTML = element.innerHTML.replace(pattern, wrapAndReplace);
	});
}

document.addEventListener('DOMContentLoaded', () => {
  targetStrings.forEach(({
  	selector,
    targetString,
    replacementString,
    appendedClassName
  }) => {
    wrapAndReplaceMatches(selector, appendedClassName, targetString, replacementString)
  })
});
</script>