lovecoding
/
web0331


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <span>1</span>
    <span>2</span>
    <span>3</span>
    <span>4</span>
    <span>5</span>
    <button id="btn1">
        添加
    </button>
    <script>
        // 获取同一元素所有标签
        var spans = document.querySelectorAll('span');
        console.log(spans)
        var btn1 = document.getElementById("btn1");
        btn1.onclick = function() {
            // 往节点内添加内容
            spans[1].innerText ='我的'
        }
    </script>
</body>
</html>