vue.js - How can I use `console.log` or `console.error` in a vue template?

Question

I have a vue component with

 <form @keydown="console.error($event.target.name);">

gives

app.js:47961 [Vue warn]: Property or method "console" is not defined on the instance but referenced during render.

window.console doesn't work either

What is the proper way to use console and window in a template to debug?

question from:https://stackoverflow.com/questions/51080447/how-can-i-use-console-log-or-console-error-in-a-vue-template

Answer 1

If you want to run it inline instead of using a method, just add this to the form:

Codepen: https://codepen.io/x84733/pen/PaxKLQ?editors=1011

<form action="/" @keydown="this.console.log($event.target.name)">
  First: <input type="text" name="fname"><br>
  Second: <input type="text" name="fname2"><br>
</form>

But it'd be better to use a method instead of running functions inline, so you have more control over it:

<!-- Don't forget to remove the parenthesis -->
<form action="/" @keydown="debug">
  First: <input type="text" name="fname"><br>
  Second: <input type="text" name="fname2"><br>
</form>

...

methods: {
  debug (event) {
    console.log(event.target.name)
  }
}