How to show long float number in d3.js?

@lily 

To display a long float number in D3.js, you can use the toFixed() method to limit the number of decimal places. Here's an example:

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let longNumber = 123456.78901234567;
let formattedNumber = longNumber.toFixed(4); // Limit to 4 decimal places

console.log(formattedNumber); // Output: 123456.7890

You can then use the formattedNumber variable in your D3.js code to display the long float number with the desired precision.