Transform a string into a boolean value for a checkbox

Question

Transform a string into a boolean value for a checkbox

When using v-model to show checked or unchecked checkboxes, the following code is being utilized:

<template v-for="(item, index) in myFields">
  <v-checkbox
     v-model="myArray[item.code]"
     :label="item.name"       
   />
</template>

Initially, everything works as expected when receiving true or false values from the API. However, the situation changes when string values such as "true" or "false" are received, resulting in the checkbox always being checked. To address this issue, the code was modified to:

v-model="Boolean(myArray[item.code])"

Unfortunately, this adjustment led to an error:

'v-model' directives require the attribute value which is valid as LHS

What would be the appropriate solution to overcome this problem?

javascript typescript vue.js

Answer 1

Answer №1

Attempting Boolean(myArray[item.code]) will not yield the desired outcome because the string 'false' evaluates to true. Therefore, Boolean('false') will actually return true.

Instead, you should use myArray[item.code] !== 'false'.
The value of 'false' will result in false, whereas any other string will result in true.

EDIT: It is important to convert myArray into an array of booleans like this:

myArray.map((element) => element !== 'false')

After making this adjustment, the code will function as intended.

<template v-for="(item, index) in myFields">
  <v-checkbox
     v-model="myArray[item.code]"
     :label="item.name"       
   />
</template>

Answer 2

Attempting Boolean(myArray[item.code]) will not yield the desired outcome because the string 'false' evaluates to true. Therefore, Boolean('false') will actually return true.

Instead, you should use myArray[item.code] !== 'false'.
The value of 'false' will result in false, whereas any other string will result in true.

EDIT: It is important to convert myArray into an array of booleans like this:

myArray.map((element) => element !== 'false')

After making this adjustment, the code will function as intended.

<template v-for="(item, index) in myFields">
  <v-checkbox
     v-model="myArray[item.code]"
     :label="item.name"       
   />
</template>

Transform a string into a boolean value for a checkbox

Answer №1

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