vuejs how to display div based on dynamic array values?

Question

I want to show/hide a new div if any of the user links clicked:

<ul id="pm-tabs"> 
  <li v-for="user in unreadMsgsList">       
     <a @click="openPMbox(user)"> ${user}</a>
  </li>
</ul>

the method is:

    openPMbox: function(user) {              
         this.isPmBoxOpenList[user] = !this.isPmBoxOpenList[user];
    },

the user data is stored at isPmBoxOpenList: [] and I can verify that it is properly filled.

The window that should show/hide is like this and is out of v-for loop above:

<div class="pmbox" v-bind:disabled=="isPmBoxOpenList" >Some Text </div>

But I get error at template. Not sure how should I define pmbox so appreciate your hints.

P.S. It worths mentioning user is not define in data. It is only an object in isPmBoxOpenList array.

The error that I get is Uncaught TypeError: Cannot read property 'scrollHeight' of null at WebSocket.<anonymous> (app.js:68) — Karlom
– Karlom, Commented Mar 17, 2017 at 6:06

Saurabh · Accepted Answer · 2017-03-17 05:56:03Z

3

You can use v-if, to display or hide like this:

<div class="pmbox" v-if="isPmBoxOpenList[user]" >Some Text </div>

answered Mar 17, 2017 at 5:56

Saurabh

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8 Comments

Karlom Over a year ago

Well, this gives: ReferenceError: user is not defined. Not surprising as user is not in global context.

Saurabh Over a year ago

in v-if you have to give the variable based on which you want to show or hide the div

Karlom Over a year ago

Right, but the very question is how to bind that v-if variable to an array variable which is not itself defined as a data variable.

Saurabh Over a year ago

@Karlom Well I could not figure out from the question that it isn''t part of data variable. v-if will be able to access one of data variable, computed property, method. It will not be aware of other variables.

Karlom Over a year ago

Sorry I should have been more clear in the question. So what you reckon as appropriate solution in this circumstances?

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