Question

我不知道此错误，因为我只是检查了所有其他主题，但没有得到结果。

let demo = document.getElementById("#demo");
demo.innerText("yo");

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Pract</title>
</head>
<body>
    <script src="javascript.js"></script>
    <p id="demo"></p>
</body>
</html>

Answer 1

//currently your id is demo

let demo = document.getElementById("demo");
demo.innerText="yo";

///if your id is  #demo use this
let demo2 = document.getElementById("#demo");
demo2.innerText="yolo";

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Pract</title>
</head>
<body>
    <script src="javascript.js"></script>
    <p id="demo"></p>
    <p id="#demo"></p>
</body>
</html>

由于您的ID是demo，而不是#demo，因此您需要这样编写代码：

let demo = document.getElementById("demo");  // don't use #
demo.innerText = "yo";  // Also change innerText like this

要更改innerText属性，请查看docs。 innerText不是方法。

未捕获的TypeError：无法读取null的属性'innerText'

1 个答案: