src/js/ife/task_20.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>task20</title>
    <style>
        #result {
            display: -webkit-flex;
            display: -ms-flexbox;
            display: flex;
        }

        #result div {
            background-color: pink;
            height: 30px;
            line-height: 30px;
            min-width: 30px;
            text-align: center;
            margin: 5px;
        }

        #result span {
            background-color: red;
        }
    </style>
</head>
<body>
<div class="ctrl">
    <textarea id="textArea" rows="5" cols="20" placeholder="please input"></textarea>
    <button id="insert">插入</button>
    <button id="search">查询</button>
    <input id="searchInput">
</div>

<div id="result"></div>
<script>
    $ = function (el) {
        return document.querySelector(el);
    };

    var arrData = [];

    $('#insert').onclick = function () {
        var str = $('#textArea').value.trim();
//        分割字符串
        var arrWord = str.split(/[^0-9a-zA-Z\u4e00-\u9fa5]+/).filter(function (e) {
            return e.length != 0;
        });

        arrData = arrData.concat(arrWord);

        render();
    };

    $('#search').onclick = function () {
        var str = $('#searchInput').value.trim();
        render(str);
    };

    function render(str) {
        $('#result').innerHTML = arrData.map(function (d) {
            if (str != null && str.length > 0) {
                d = d.replace(new RegExp(str, "g"), "<span class='select'>" + str + "</span>");
            }
            return '<div>' + d + '</div>';
        }).join('');
    }
</script>
</body>
</html>