What is the best way to activate input fields based on whether or not a specific mat-option is chosen?

After finding a solution in this discussion, I was able to determine the selected state of a clicked option. My goal is to disable an input field based on the selection of a specific option. The current code allows me to enable or disable the input field when any option is checked or unchecked. However, I want to specifically disable the input field only if the second option (Mushroom) is unchecked. If the second option is checked, then the input field should be enabled. How can I achieve this?

Check out the example on StackBlitz

angulartypescriptangular-materialmat-form-fieldmat-option

Answer №1

To make this work, simply link your formcontrol value to the [disabled] directive of mat-input.

1) Get the value of toppings (form control)

isValueSelected(): boolean {
    let valueArray: any = this.toppings.value || [];
    console.log(valueArray, valueArray.includes('Mushroom'));
    return !valueArray.includes('Mushroom');
 }

2) Connect it to the [disabled] directive

<input id="numeDB_SQLite" type="text" name="numeDB_SQLite" [disabled]="isValueSelected()"/>

I have made updates to your stackblitz here. Please upvote/select if this is helpful.

Answer №2

To disable if a certain value is selected

<input id="numeDB_SQLite" type="text" matInput 
      [disabled]="toppings?.value && toppings.value.length" ../>

To disable when a specific element is chosen, for example

<input id="numeDB_SQLite" type="text" matInput 
          [disabled]="toppings?.value && toppings.value.includes('Mushroom')" ../>

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