The TypeError encountered when using vue.js push arises from attempting to access the 'name' property of an undefined value

Here is a code snippet I am working with:

new Vue({    
    el: '#core',
    data: {
        checkedThemes: []
        ...
    }
})

Afterwards, I have the following code:

mounted() {
    ...
    var theme = parseInt(parameters['theme']);
    this.checkedThemes.push(theme);
    ...
}

When I try to push the value, a TypeError: Cannot read property 'name' of undefined is raised. Strangely, it works when I add values manually on the webpage.

Update: This error occurs in Chrome. In Firefox, I receive: [Vue warn]: Error in render: "TypeError: themes[checkedTheme] is undefined"

Despite the error, the array seems to be properly filled after the push operation.

https://i.sstatic.net/q57jE.png

Any insights on where this error might originate from?

Answer №1

Opting to debug using Firefox proved to be a wise decision, as it revealed the following message: [Vue warn]: Error in render: "TypeError: themes[checkedTheme] is undefined"

The issue was pinpointed to the html (render) segment.

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