The method signature for appending to a URLSearchParams object in TypeScript is defined as
append(name: string, value: string): void;While I successfully appended an array and number in the browser, it resulted in an error when running the TypeScript code.
A visit to MDN revealed an example where a number was used as a value: https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams/append
I am curious if values other than strings can be used in TypeScript.
Typescript serves as a safeguard against errors that arise from mistakenly using the incorrect data type.
By default, a URL is considered to be a single string, making it unnecessary for the method to accept anything other than a string.
With Typescript, converting a number to a string can be done simply by:
const num = 1;
whatever.append('param', num + ''); // or use num.toString()
In JavaScript (without the Typescript layer), the conversion of a number to a string occurs automatically when appended to a URL within the .append() function, either immediately or at a later stage.
However, in JavaScript, it is also possible to pass a variable of type Date. While this might work, the .append() function could potentially become confused, generate an error, or invoke the default .toString() method of Date, which may not be desired.
The reason it functions in the browser is because browsers interpret JavaScript, not TypeScript directly. TypeScript must be compiled into JavaScript before execution - you cannot execute pure TypeScript code. To resolve the issue, try converting your array and number to strings before using the append function. For example:
const name = [0, 1, 2];
const value = 3;
const stringName = name.toString();
const stringValue = value.toString();
x.append(stringName, stringValue);
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