What is the reason for the unique behavior of v-bind with boolean attributes? More specifically, why is the number 0 considered truthy in

According to the official documentation,

<button v-bind:disabled="isButtonDisabled">Button</button>

In this example, the disabled attribute will be added if isButtonDisabled is equal to 0, despite the fact that in JavaScript, 0 is considered a falsy value.

Answer №1

It appears that the way in which the button is disabled is determined by the vendor and the values are not actual boolean values, but rather strings that JavaScript interprets as false due to their non-boolean nature.

As stated in the official documentation:

If the value of isButtonDisabled is null, undefined, or false, the disabled attribute will not be included at all in the resulting <button> element.

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