boolean
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Package description
The 'boolean' npm package is a simple utility that helps in converting various types of values to a boolean. It is particularly useful when dealing with values that are expected to be true or false but may come in different formats, such as strings, numbers, or even undefined.
Convert any value to a boolean
This feature allows you to convert various types of values, including strings, numbers, and null or undefined, to a strict boolean value. It is useful for ensuring that you are working with a true boolean in your logic.
const boolean = require('boolean');
console.log(boolean('true')); // true
console.log(boolean('false')); // false
console.log(boolean('1')); // true
console.log(boolean('0')); // false
console.log(boolean(1)); // true
console.log(boolean(0)); // false
console.log(boolean(undefined)); // false
console.log(boolean(null)); // false
console.log(boolean('yes')); // true
console.log(boolean('no')); // falseThe 'to-bool' package is similar to 'boolean' in that it converts values to booleans. However, it may have different rules for conversion or additional/different features.
The 'boolify' package also converts values to booleans. It might offer a different API or conversion logic, which could make it more suitable for certain use cases compared to 'boolean'.
Similar to 'boolean', 'cast-boolean' is designed to cast values to booleans. The differences could be in the specific set of values it interprets as true or false, or in the way it handles edge cases.
Readme
boolean converts lots of things to boolean.
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$ npm install boolean
First you need to add a reference to boolean in your application:
const { boolean, isBooleanable } = require('boolean');
If you use TypeScript, use the following code instead:
import { boolean, isBooleanable } from 'boolean';
To verify a value for its boolean value, call the boolean function and provide the value in question as parameter:
console.log(boolean('true')); // => true
The boolean function considers the following values to be equivalent to true:
true (boolean)'true' (string)'TRUE' (string)'t' (string)'T' (string)'yes' (string)'YES' (string)'y' (string)'Y' (string)'on' (string)'ON' (string)'1' (string)1 (number)In addition to the primitive types mentioned above, boolean also supports their object wrappers Boolean, String, and Number.
Please note that if you provide a string or a String object, it will be trimmed.
All other values, including undefined and null are considered to be false.
From time to time, you may not want to directly convert a value to its boolean equivalent, but explicitly check whether it looks like a boolean. E.g., although boolean('F') returns false, the string F at least looks like a boolean, in contrast to something such as 123 (for which boolean(123) would also return false).
To figure out whether a value can be considered to be a boolean, use the isBooleanable function:
console.log(isBooleanable('true')); // => true
The isBooleanable function considers all of the above mentioned values to be reasonable boolean values, and additionally, also the following ones:
false (boolean)'false' (string)'FALSE' (string)'f' (string)'F' (string)'no' (string)'NO' (string)'n' (string)'N' (string)'off' (string)'OFF' (string)'0' (string)0 (number)To run quality assurance for this module use roboter:
$ npx roboter
FAQs
boolean converts lots of things to boolean.
The npm package boolean receives a total of 1,495,747 weekly downloads. As such, boolean popularity was classified as popular.
We found that boolean demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 5 open source maintainers collaborating on the project.
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