JavaScript detects if the string contains the html tag implementation method

Function code

/**

 *  Whether the string contains html Detection of labels 

 * @param htmlStr

 */

function checkHtml(htmlStr) {

    var  reg = /<[^>]+>/g;

    return reg.test(htmlStr);

}

/**

 *  Whether the string contains html Detection of labels 

 * @param htmlStr

 */

function checkHtml(htmlStr) {

    var  reg = /<[^>]+>/g;

    return reg.test(htmlStr);

}

window.onload=function(){

    var html=document.querySelector('#box').innerHTML;

    alert(checkHtml(html))

}

 <div id="box">

        sdfsdf

        <div></div>

        <span>sdfsdf</span>

    </div>