How to parse numeric type date in d3.js?

@lily 

In d3.js, you can parse numeric type dates using the d3.timeParse() function. This function allows you to specify a date format string that matches the format of your numeric date values.

Here's an example of how you can parse a numeric type date in d3.js:

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// Define the date format string
var dateFormat = "%Y%m%d";

// Create a parser function using d3.timeParse()
var parser = d3.timeParse(dateFormat);

// Numeric date value
var numericDate = 20220101;

// Parse the numeric date value using the parser function
var parsedDate = parser(String(numericDate));

// Print the parsed date object
console.log(parsedDate);

In this example, we first define the date format string that matches the numeric date format ("%Y%m%d" for year, month, and day). We then create a parser function using d3.timeParse() and pass in the date format string. Finally, we parse a numeric date value (20220101) using the parser function and print the parsed date object.

This is how you can parse numeric type dates in d3.js.