It is necessary that the word change the background color

style.css

.red{ background-color: red; }

content.js

  walk(document.body); function walk(node) { var child, next; switch ( node.nodeType ) { case 1: case 9: case 11: child = node.firstChild; while ( child ) { next = child.nextSibling; walk(child); child = next; } break; case 3: handleText(node); break; } } function handleText(textNode) { var v = textNode.nodeValue; v = v.replace(/Apple/gi, '<span class="red">Pineapple</span>'); textNode.nodeValue = v; }

Screenshot

    1 answer 1

    Try to change not nodeValue, but innerHTML.

    • Will not work. It is necessary to do in another place. - Qwertiy ♦