为什么我的JavaScript文件无法加载?

编程入门行业动态更新时间:2024-10-28 06:24:12

本文介绍了为什么我的JavaScript文件无法加载?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

这是我的html文件的代码:

This is the code of my html file:

<html> <head> <script type="text/javascript" src="try1.js"></script> </head> <body> <h1>A Web Page</h1> <p id="demo">A Paragraph</p> <button type="button" onclick="myFunction()">Try it</button> </body> </html>

这是我的javascript文件的代码:

And this is the code of my javascript file:

function myFunction() { document.getElementById("demo").innerHTML = "Paragraph changed"; }

推荐答案

因为该元素尚不存在.尝试将javascript放在正文的最后

Because the element doesn't exist yet. Try putting the javascript at the end of the body

<html> <head> <title>Example<title> </head> <body> <h1>A Web Page</h1> <p id="demo">A Paragraph</p> <button type="button" onclick="myFunction()">Try it</button> <script type="text/javascript" src="try1.js"></script> </body> </html>

内联时似乎很好用.

<h1>A Web Page</h1> <p id="demo">A Paragraph</p> <button type="button" onclick="myFunction()">Try it</button> <script type="text/javascript"> function myFunction() { document.getElementById("demo").innerHTML = "Paragraph changed"; } </script>