题解 | #字体高亮#

var text = document.querySelector(".text");
            var search = document.querySelector("input");
            const btn = document.querySelector("button");
            btn.onclick = () => {
                // 补全代码
                let str = text.innerText;
                const keywords = search.value.trim();

                if(keywords) {
                    str = str.replace(new RegExp(keywords,'g'),
							`<b style="background-color: yellow;">${keywords}</b>`
						)
                }
                text.innerHTML = str;
                
            }