Let’s talk about the problem that IE browser cannot use JavaScript

JavaScript is a widely used programming language, supported by almost all modern browsers. However, some users have encountered problems with JavaScript being unable to work in IE. In this article, we will explore the reasons why IE cannot use JavaScript and provide ways to solve this problem.

Reason:

IE browser is the abbreviation of Internet Explorer browser, which is a browser developed and launched by Microsoft Corporation. Because the core of IE is different from other modern browsers, it supports and interprets JavaScript differently. The following are several reasons why IE browser cannot use JavaScript:

1. Binding problem: In very early versions of IE browser, the "attachEvent" function was usually used to bind events. However, there are compatibility issues with this approach. Modern browsers use the "addEventListener" function to bind events, and they do not support the attachEvent function. This may prevent JavaScript from being used in IE.
2. JSON format issue: JSON is a commonly used data format and is widely used in front-end and back-end development. However, there may be problems with JSON parsing in IE. This is because IE only supports a specific JSON parser. For example, IE browser 8 and below must use Microsoft's parser, while IE browser 9 supports the native JSON parser.
3. Incompatibility issues: IE browser does not support some JavaScript features and APIs that modern browsers already support, such as the new features of ES6 and ES7, the functions of HTML5 and CSS3, and WebSocket.

Solution:

Although IE browser has the above problems, we can still take some methods to solve them to ensure that JavaScript code can run normally in IE browser. Here are several possible solutions:

1. Choose the right function: As a developer, you should pay attention to using the right function when writing JavaScript code. For example, the addEventListener function should be used instead of the attachEvent function to bind events.
2. Use JSON parser: If using JSON format in IE browser, please use the available parser instead of using the native JSON parser supported by modern browsers. For example, use Microsoft's JSON parser to parse JSON data.
3. Application compatibility solution: In order to support the new features and APIs of ES6 and ES7 in IE browser, we can use some plug-ins or libraries to provide compatibility solutions. For example, using Babel.js you can convert ES6 and ES7 code to ES5 code, thus achieving compatibility.

Conclusion:

The problem of IE browser not being able to use JavaScript may exist for a while, but by taking the correct solutions, we can still run JavaScript normally in IE browser code. Although modern browsers have more advanced features and functions, we still need to ensure that our JavaScript code runs properly in IE in order to better serve different target audiences.

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