In this section, we mainly discuss json parsing. If you are interested, you can understand JSON. the parse () method can also receive another parameter. this parameter is a function that calls each key-value pair, I hope this article will help you. In this section, we will mainly discuss json parsing.
The JSON. parse () method can also receive another parameter, which is a function that calls each key-Value Pair early. To distinguish JSON. the replacer function received by stringify (). This function is called the restore function (reviver ), but in fact, the signatures of these two functions are the same-they both receive connection parameters, one key and one value, and both need to return a value.
If the restore function returns undefined, the corresponding key is to be deleted from the result. If other values are returned, the value is inserted into the result. For example:
The Code is as follows:
