js中json字符串转义方法
    ## JSON String Escaping Methods in JavaScript.
    JSON (JavaScript Object Notation) is a popular data format used to represent structured data. It is often used to transfer data between a server and a client, or to store data in a database.
    When working with JSON strings, it is important to be aware of the special characters that can cause problems. These characters include:
    Double quotes (")。
    Single quotes (')。
    Backslash (\)。
    Forward slash (/)。
    Line feed (\n)。
    Carriage return (\r)。
    Tab (\t)。
    If any of these characters appear in a JSON string, they must be escaped. This means that they must be preceded by a backslash (\). For example, the following JSON string contains a double quote character that has been escaped:
    { "name": "John Doe" }。
    There are two main methods for escaping special characters in JavaScript:
    Using the escape() function.
    Using the JSON.stringify() method.
    ### Using the escape() Function.
    The escape() function is a built-in JavaScript function that can be used to escape any ch
aracter in a string. To escape a character, simply pass it as an argument to the escape() function. For example, the following code escapes the double quote character in the string "John Doe":
    var escapedString = escape("John Doe");
    The escapedString variable now contains the following value:
    John%20Doe.
    As you can see, the double quote character has been replaced by the escape sequence %20.
    ### Using the JSON.stringify() Method.
    The JSON.stringify() method is a built-in JavaScript method that can be used to convert a JavaScript object to a JSON string. The JSON.stringify() method automatically escapes any special characters in the object. For example, the following code converts the following JavaScript object to a JSON string:
字符串截取方法js

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