Loss of precision occurs when converting a BigDecimal value from a JSON

After making a network call, the backend is sending the following data:

"uom" : "EA",
"qty" : 1.123456789012345678

However, when this information reaches the frontend and is logged using console.log:

{ 
  qty: 1.1234567890123457, 
  uom: "EA"
}

Why does it appear that JavaScript is either losing the last digit of the number or truncating it?

In Java, the number is represented using BigDecimal. The front end uses AngularJs framework and makes a GET request to the backend for a JSON response.

javascriptjavajsonangularjsbigdecimal

Answer №1

When it comes to Javascript floating point numbers, they have 64 bits of precision much like a double in Java. However, if you find yourself needing more precision beyond that, using BigDecimal in Java, you'll need to employ a similar approach in Javascript to surpass its limitations. One option is to utilize the NPM package js-big-decimal which allows you to transfer values as strings in JSON format to avoid them being interpreted as Numbers by JSON.parse.

Answer №2

Appreciate the assistance. I discovered that by including

@JsonProperty
public String retrieveQuantity(){
   return this.quantity;
}

in the Java model resolves the problem.

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