Vue: Customize data based on userAgent

Question

Vue: Customize data based on userAgent

As a newcomer to VUE, I am attempting to dynamically modify the disabled value based on the userAgent in order to display or hide the paymentMethod:

data() {
            return {
                paymentMothods: [
                    { name: 'Visa checkout', img: 'visa.png', disabled: false, height: '19', class: 'v-button' },
                    { name: 'PayPal', img: 'paypal.png', disabled: false, height: '18.9', class: '' },
                    { name: 'PhonePE', img: 'phonepe.png', disabled: true, height: '18.9', class: 'phonepe' },
                ]
           }
},

If the userAgent is phonepe-webview, I am trying to adjust the value as follows:

methods: {
            phopepeMatch: function () {
                let userAgent = navigator.userAgent
                let phonepeMatch = userAgent.match("phonepe-webview")
                if (phonepeMatch === "phonepe-webview"){
                    this.paymentMothods[2].disabled = false
                    return true
                }
                else {
                    return false
                }
            }
},

Despite my efforts, the payment method remains invisible :(

javascript vue.js user-agent

Answer 1

Answer №1

There seems to be some confusion about what the match function actually returns. When there is a match, it returns an array and not just the string that was matched. If there is no match, it returns null. You can find more information about this here.

To address this issue, you can make the following adjustments in your code:

checkPhonepeMatch: function () {
  let userAgent = navigator.userAgent;
  let phonepeMatch = userAgent.match("phonepe-webview");
  if (phonepeMatch === null) {
    return false;
  } else {
    this.paymentMethods[2].disabled = false;
    return true;
  }
}

Answer 2

There seems to be some confusion about what the match function actually returns. When there is a match, it returns an array and not just the string that was matched. If there is no match, it returns null. You can find more information about this here.

To address this issue, you can make the following adjustments in your code:

checkPhonepeMatch: function () {
  let userAgent = navigator.userAgent;
  let phonepeMatch = userAgent.match("phonepe-webview");
  if (phonepeMatch === null) {
    return false;
  } else {
    this.paymentMethods[2].disabled = false;
    return true;
  }
}

Answer 3

Answer №2

Utilize the .splice() method.

methods: {
        phopepeMatch: function () {
            let userAgent = navigator.userAgent
            let phonepeMatch = userAgent.match("phonepe-webview")
            if (phonepeMatch === "phonepe-webview"){
                // First, make a copy of the object
                let payment_method = this.paymentMothods[2];
                // Next, modify the desired property of the object
                payment_method.disabled = false;
                // Finally, replace the old object with the updated one
                this.paymentMothods.splice(2, 1, payment_method);
                return true
            }
            else {
                return false
            }
        }

},

Additional details:

In the Vue documentation, specifically in the Reactivity in depth section, it mentions:

Vue cannot automatically detect the following array changes:

1.) Directly setting an item using the index, e.g., vm.items[indexOfItem] = newValue

2.) Changing the length of the array, e.g., vm.items.length = newLength

However, there is a way to handle this so that Vue's Reactivity System can recognize alterations in arrays.

Instead of doing this:

this.paymentMothods[2].disabled = false

You should follow this approach:

let payment_method = this.paymentMothods[2];

payment_method.disabled = false;

this.paymentMothods.splice(2, 1, payment_method);

or alternatively (using this.$set()):

let payment_method = this.paymentMothods[2];

payment_method.disabled = false;

this.$set(this.paymentMothods, 2, payment_method);

Answer 4

Utilize the .splice() method.

methods: {
        phopepeMatch: function () {
            let userAgent = navigator.userAgent
            let phonepeMatch = userAgent.match("phonepe-webview")
            if (phonepeMatch === "phonepe-webview"){
                // First, make a copy of the object
                let payment_method = this.paymentMothods[2];
                // Next, modify the desired property of the object
                payment_method.disabled = false;
                // Finally, replace the old object with the updated one
                this.paymentMothods.splice(2, 1, payment_method);
                return true
            }
            else {
                return false
            }
        }

},

Additional details:

In the Vue documentation, specifically in the Reactivity in depth section, it mentions:

Vue cannot automatically detect the following array changes:

1.) Directly setting an item using the index, e.g., vm.items[indexOfItem] = newValue

2.) Changing the length of the array, e.g., vm.items.length = newLength

However, there is a way to handle this so that Vue's Reactivity System can recognize alterations in arrays.

Instead of doing this:

this.paymentMothods[2].disabled = false

You should follow this approach:

let payment_method = this.paymentMothods[2];

payment_method.disabled = false;

this.paymentMothods.splice(2, 1, payment_method);

or alternatively (using this.$set()):

let payment_method = this.paymentMothods[2];

payment_method.disabled = false;

this.$set(this.paymentMothods, 2, payment_method);

Vue: Customize data based on userAgent

Answer №1

Answer №2

Additional details:

Similar questions

What is the process for using Discriminators, the Mongo DB API, and Mongoose to insert data into Cosmos DB?

Stop users from signing up if the chosen username is already in use

Troubleshoot my code for clustering markers on a Google map

What is the best way to adjust and filter an array based on a single value?

Switch between two functions by clicking a button

Retry request with an AngularJS interceptor

Is there a way for me to show "No data" when the json response in vue js is empty?

Automatically populate the article number field once the article name has been entered

Generate dynamic forms utilizing JSON data

Tips for including a JSON file within the utils directory of a Node.js project

Using JavaScript, extract current date from an API data

Troubleshooting issues with adding child elements in JavaScript

Activate the action using the onclick interaction

There was a failure to establish a Redis connection to the server with the address 127.0.0.1 on port 6379

What is the purpose of using a callback like "function(value) {return my_function(value);}" in node.js programming?

Roundabout Navigation Styles with CSS and jQuery

Adjust dropdown options based on cursor placement within textarea

Experiencing a "non-serializable value found in the state" error specifically while utilizing redux toolkit, but this issue does not occur with traditional redux implementations

Executing a function within a VueJs 2 component immediately after it has finished loading

Working with Vue.js: accessing nested data from child components within a v-for loop