为什么.textContent隐藏在Javascript中？

Question

即使if语句显示 .textContent ，为什么.textContent隐藏在.textContent ？ 我需要在代码中添加什么以使其不被隐藏？

 function F1() { var xmv = ['1', '2']; xm = document.getElementById("xm"); one = document.getElementById("one"); two = document.getElementById("two"); XM = xmv[Math.floor(Math.random() * xmv.length)]; xm.innerHTML = XM; if (xmv === '1') { one.textContent = "one"; } if (xmv === '2') { two.textContent = "two"; } }

 <button onclick="F1()"> New </button> <p> <label id="xm"> </label> <label id="one"> </label> <label id="two"> </label> </p>

Answer 1

发生这种情况是因为您将数组xmv与始终为假的字符串进行比较。 您需要将XM与字符串进行比较，例如：

 function F1() { var xmv = ['1', '2']; xm = document.getElementById("xm"); one = document.getElementById("one"); two = document.getElementById("two"); XM = xmv[Math.floor(Math.random() * xmv.length)]; xm.innerHTML = XM; one.textContent = two.textContent = ''; if (XM === '1') { one.textContent = "one"; } else if (XM === '2') { two.textContent = "two"; } }

 <button onclick="F1()"> New </button> <p> <label id="xm"> </label> <label id="one"> </label> <label id="two"> </label> </p>