strict typing a parameter from a specified value

Ahmed Shahriar Adnan answered on November 27, 2023 Popularity 1/10 Helpfulness 1/10

answer strict typing a parameter from a specified value

strict typing a parameter from a specified value

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type style = "left" | "right" | "center";

const value: { [key in style]: key } = {
  left: 'left',
  right: 'right',
  center: 'center',
}

function printText(s: string, alignment: style) {
  // ...
  console.log(alignment)
}

// This will work fine
printText("Hello, world", value.left);

// This will cause a TypeScript error because 'up' is not a valid value for 'left'
// printText("Hello, world", value.left as style);

Popularity 1/10 Helpfulness 1/10 Language typescript

Source: chat.openai.com

Tags: strict typescript typing

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Contributed on Nov 27 2023

Ahmed Shahriar Adnan

0 Answers Avg Quality 2/10

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strict typing a parameter from a specified value

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