Vue js check if string is all uppercase :In Vue.js, you can check if a string is all uppercase by first converting the string to uppercase using the JavaScript toUpperCase() method. This method returns a new string with all the characters in uppercase. Then, you can compare the original string with the new string using the strict equality operator (===). If both strings are equal, then the original string is all uppercase. This works because the toUpperCase() method only changes the case of the characters and does not modify the original string. This method can be used to validate user input or to manipulate strings in various ways in Vue.js applications.

How can you check if a string is all uppercase in Vue.js?

This code is a simple Vue.js application that checks if a user input string is all uppercase or not. It consists of an input field that binds to the “myString” data property using v-model. When the user types in the input field, the “checkUpperCase” method is called using the @input event listener.

The “checkUpperCase” method checks if the input string is equal to the uppercase version of the same string. If they are equal, it sets the “isUpperCase” data property to true; otherwise, it sets it to false.

Finally, the “isUpperCase” property is used in the template to conditionally render a message that indicates whether the input string is all uppercase or not. If it is uppercase, the message is displayed in green text; otherwise, it is displayed in red text.

Vue js check if string is all uppercase Example

<div id="app">
     <input v-model="myString" @input="checkUpperCase">
     <div v-if="myString">
      <p v-if="isUpperCase" style='color:green'>The string is all uppercase.</p>
      <p v-else style="color:red">The string is not all uppercase.</p>
    </div>
</div>
 <script type="module">
    const app = Vue.createApp({
      data() {
        return {
          myString: '',
          isUpperCase: false
        }
      },
      methods: {
        checkUpperCase() {
          if (this.myString === this.myString.toUpperCase()) {
            this.isUpperCase = true;
          } else {
            this.isUpperCase = false;
          }
        }
      }
    });app.mount("#app");
 </script>

Output of Vue js check if string is all uppercase