Summary of usage of escape in js

The escape() function in JavaScript is a function used to escape a string into an encoding. It can escape some special characters into hexadecimal escape sequences for transmission in the URL.

The usage of the escape() function is as follows:

escape(string)

Among them, string is the string to be escaped.

Let’s take a closer look at the usage of the escape() function:

1. Escape string

The escape() function can convert a string into Escape special characters. For example:

var str = "这是一个测试String!";
var escapedStr = escape(str);
console.log(escapedStr);

The output result is:

%E8%BF%99%E6%98%AF%E4%B8%80%E4%B8%AA%E6%B5%8B%E8%AF%95String%21

You can see that each character in the original string is converted into the corresponding hexadecimal encoding.

2. Escape special characters

The escape() function can escape some special characters, including special characters, spaces and other ASCII characters. For example:

var str = "Hello World!";
var escapedStr = escape(str);
console.log(escapedStr);

The output result is:

Hello%20World%21

You can see that spaces and exclamation marks are converted into and! respectively.

3. Escape non-ASCII characters

The escape() function can also escape non-ASCII characters. For example:

var str = "你好，世界！";
var escapedStr = escape(str);
console.log(escapedStr);

The output result is:

%u4F60%u597D%uFF0C%u4E16%u754C%uFF01

As you can see, each Chinese character is converted into a hexadecimal Unicode encoding starting with %u.

It should be noted that the escape() function will escape some ASCII characters, but it may not be applicable to some Unicode characters. Therefore, it is generally not recommended to use the escape() function, but to use the encodeURIComponent() function for URL encoding.

This is a summary of the usage of the escape() function in JavaScript. By escaping strings or special characters, we can ensure that the string can be transmitted normally in the URL. However, we should try to avoid using the escape() function in actual development and instead use the encodeURIComponent() function for URL encoding.

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