无法通过document.GetElementById(“javaScript函数”)访问元素
这是不显示“hello world”的示例代码。 `无法通过document.GetElementById(“javaScript函数”)访问元素,javascript,html,Javascript,Html,这是不显示“hello world”的示例代码。 ` <p>This is example </p> <button id="myBtn" onclick="function1()">Try it</button> <p id="demo"></p> <script> function function1(){ document.write("hii"); document.getElementById
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
这是一个示例
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
试试看
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
函数function1(){
文件。编写(“hii”);
document.getElementById(“demo”).innerHTML=“Hello World”;
}
`必须将
文档.getElementById
存储在变量中。试试这个
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
<p>This is an example</p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
var demo = document.getElementById("demo")
demo.innerHTML = "Hello World";
}
</script>
</body>
</html>
这是一个例子
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
试试看
<p>This is example </p>
<button id="myBtn" onclick="function1()">Try it</button>
<p id="demo"></p>
<script>
function function1(){
document.write("hii");
document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
函数function1(){
文件。编写(“hii”);
var demo=document.getElementById(“demo”)
demo.innerHTML=“你好世界”;
}
他不需要太多。当他点击按钮时,他正在调用它。document.write
覆盖整个文档。在下一行,所有内容都消失了,包括您的元素Don't use:“注意:作为文档。write
写入文档流,调用document.write对关闭(加载)的文档自动调用document.open,这将清除文档。”我只是用它来查看是否调用了函数。排除document.write dosent解决我的疑问。谢谢@Oqhax它起作用了。没有必要这样做。查看@adeneo对OP问题的评论,这就是我否决你的原因。