screen_rotation
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<!DOCTYPE html> <html> <head> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> </head> <body> <div id="app"> <h3>Vue Js Check Object Property is undefined</h3> <p v-if="typeof myObject.email === 'undefined'">The property is undefined</p> <p v-else>The property is defined</p> </div> <script> new Vue({ el: '#app', data() { return { myObject: { name: 'Andrew', email: undefined } }; } }); </script> </body> </html>