cssClass in Alert not working

Hi, I have the next code


 const alert = await this.alertController.create({
          header: 'Register Code',
          message: `Code : <strong style="user-select: text;">${res['code']}</strong>`,
          buttons: ['OK'],
          cssClass : 'TextSelectable'

await alert.present();


.TextSelectable {
    --background: #000000 !important;
    user-select: text;
    .alert-message {
        background: red;

and not work , but in <ion-alert class="... TextSelectable ..."> there is the class and not work, the styles aren´t in the page

somebody can help me

try moving the declaration of your css-class from home.page.scss to the global ‘global.scss’.

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