未捕获的ReferenceError：未在HTMLButtonElement.onclick上定义测试
[英]Uncaught ReferenceError: testing is not defined at HTMLButtonElement.onclick
问题描述
I know this kind of question has been asked tons of time before. 
我知道这种问题已经被问了很多次了。
So sorry for that i am new to react js, JavaScript etc. And i am using react app tool for this project. 非常抱歉，我是React JS，JavaScript等的新手。我正在为该项目使用react app工具。
I am preparing login form. 我正在准备登录表格。 So feature is simple when user click on login button. 因此，当用户单击登录按钮时，功能很简单。 function should be called. 函数应该被调用。
my function is in src/xyz and i want it to invoke from my index.html. 我的函数在src / xyz中，我希望它从index.html调用。 but it fails. 但是失败了。 and give exception 并给予例外
public
上市 - index.html index.html
- see.js see.js
- index.html
src
src - xyz.js xyz.js
- xyz.js
//my code in src/xyz.js function testing(){ console.log("welcome user") } //this code works which is in same directory // public/see.js function hello(){ console.log("hi") }
<!DOCTYPE html> <html lang="en"> <head> <script type = "text/javascript" src="/src/index.js"></script> <script type = "text/javascript" src="./see.js"></script> <script type = "text/javascript" src="/src/xyz.js"></script> </head> <body> <div class="root"> <h1>Login form</h1> <table id=login> <tr> <td>UserName</td> <td><input type="email" /> </td> </tr> <tr> <td>password</td> <td><input type="password" /></td> </tr> <tr> <td></td> <td> <button type="submit" id="login" onclick="testing()">Log In</button> </td> </tr> </table> </div> </body> </html>
2 个解决方案
解决方案1
0 2019-01-28 12:27:18
it's from your src attribute, notice that you have "./" for see.js and just "/src/xyz" you should probably change it to "./src/xyz.js" 它来自您的src属性，请注意，对于see.js，您使用“ ./”，而对于“ / src / xyz”，您应该将其更改为“ ./src/xyz.js”
<script type = "text/javascript" src="./see.js"></script> <script type = "text/javascript" src="/src/xyz.js"></script>
解决方案2
-1 2019-01-28 12:27:55
first you know react structure in react you don't invoke js file into public/index.html but using src/index.js file you access all the content. 首先，您知道React中的react结构，您不会将js文件调用到public / index.html中，但是使用src / index.js文件可以访问所有内容。 all file import in src/index.js 所有文件导入src / index.js
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