pdfUncaught (in promise) ReferenceError: pdfjsLib is not defined
时间: 2023-10-29 17:08:53 浏览: 30
这个错误通常出现在使用PDF.js库时没有正确引入库文件。请确保在你的HTML文档中正确引入了PDF.js的库文件。例如:
```html
<script src="path/to/pdf.js"></script>
```
另外,还需要确保在使用PDF.js库之前,库文件已经被完全加载。你可以在使用PDF.js之前使用`window.onload`事件来确保DOM和所有资源都已经加载完毕。例如:
```html
<script>
window.onload = function() {
// 在这里使用PDF.js
};
</script>
```
相关问题
Uncaught ReferenceError: pdfjsLib is not defined
This error message indicates that the variable "pdfjsLib" has not been defined in your code.
To resolve this error, you need to make sure that you have properly included the PDF.js library in your project and that you have assigned the correct variable name to it.
Here are some steps you can follow to resolve this error:
1. Make sure you have included the PDF.js library in your project. You can download the library from the official website: https://mozilla.github.io/pdf.js/getting_started/
2. Check that you have correctly referenced the PDF.js library in your HTML file. The reference should look something like this:
```
<script src="path/to/pdfjsLib.js"></script>
```
3. Make sure that you have declared the variable "pdfjsLib" in your JavaScript code. The declaration should look something like this:
```
var pdfjsLib = window['pdfjs-dist/build/pdf'];
```
4. Check that you have used the correct variable name "pdfjsLib" in your code. If you have used a different variable name, you will need to update your code to use the correct name.
By following these steps, you should be able to resolve the "Uncaught ReferenceError: pdfjsLib is not defined" error and use the PDF.js library in your project.
Uncaught (in promise) ReferenceError: err is not defined
"Uncaught (in promise) ReferenceError: err is not defined" 是一个常见的 JavaScript 错误。它表示在 Promise 中发生了一个未捕获的错误,并且错误对象 "err" 未定义。
当使用 Promise 进行异步操作时,如果在 Promise 的执行过程中发生了错误,但没有进行适当的错误处理,就会出现这个错误。在 Promise 中,可以使用 catch() 方法来捕获和处理错误。
下面是一个示例代码,展示了如何处理这个错误:
```javascript
someAsyncFunction()
.then(result => {
// 执行异步操作成功后的处理
})
.catch(err => {
// 处理发生的错误
console.error(err);
});
```
在上面的代码中,someAsyncFunction() 是一个异步函数,它返回一个 Promise 对象。如果在 Promise 的执行过程中发生了错误,就会被 catch() 方法捕获,并且错误对象会被传递给 catch() 方法中的回调函数。
如果你遇到了 "Uncaught (in promise) ReferenceError: err is not defined" 错误,可以按照上述示例代码的方式来处理错误。确保在 Promise 链中的每个步骤都进行了适当的错误处理,以避免出现未捕获的错误。
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