What is the process for creating a method within a Vue directive?

Question

What is the process for creating a method within a Vue directive?

How can I define a local method inside my directive and utilize it within the bind and componentUpdated functions? Below is the code snippet in question:

export const OutsideClick = {
  bind (el, binding, vnode) {
    console.log(new Vue());
    // call method1()
  },
  componentUpdated(el, binding, vnode) {
    console.log('updated comp', binding);
    if(binding.value[1]()) {
      // call method1();
    }
  },
  unbind(el, binding, vnode) { 
    console.log('unbinding');
  }
}

I am looking for a way to create a function inside this Directive that can be accessed by both the bind and componentUpdated methods.

javascript vue.js vuejs2 vue-component vue-directives

Answer 1

Answer №1

Incorporating a method directly inside the directive might not be feasible, but you have the option to define the method outside the directive and then invoke it from within.

function method1(el, binding, vnode) {
 ...
}

export const OutsideClick = {
 bind(el, binding, vnode) {
  console.log(new Vue());
  method1(el, binding, vnode)
 },
 componentUpdated(el, binding, vnode) 
 {
  console.log('updated comp', binding);
  if(binding.value[1]()) {
   method1(el, binding, vnode)
  }
 },
 unbind(el, binding, vnode) { 
  console.log('unbinding')
  method1(el, binding, vnode)
 }
}

Answer 2

Incorporating a method directly inside the directive might not be feasible, but you have the option to define the method outside the directive and then invoke it from within.

function method1(el, binding, vnode) {
 ...
}

export const OutsideClick = {
 bind(el, binding, vnode) {
  console.log(new Vue());
  method1(el, binding, vnode)
 },
 componentUpdated(el, binding, vnode) 
 {
  console.log('updated comp', binding);
  if(binding.value[1]()) {
   method1(el, binding, vnode)
  }
 },
 unbind(el, binding, vnode) { 
  console.log('unbinding')
  method1(el, binding, vnode)
 }
}

Answer 3

Answer №2

To properly utilize the directive, it's important to define the function outside of the directive and then invoke it within the lifecycle methods as illustrated in the example below.

Vue.directive("color", {

  "bind": function() {
    console.log("directive active");
    hello();
  },


  "unbind": function() {
    console.log("directive deactive");
  },


  "update": function(newValue, oldValue) {
    var el = $(this.el); 


    if (this.arg == 'background')
      el.css('background', newValue);
    else
      el.css('color', newValue);
  },
});

function hello() {
  console.log('hello');
}

new Vue({
  el: '#app'
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/1.0.24/vue.min.js"></script>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>

<div id="app>
  <h2>Color</h2>
  <select v-model="color">
    <option value="#f00">Red</option>
    <option value="#0f0">Green</option>
    <option value="#00f">Blue</option>
    <option value="#000" selected>Black</option>
  </select>
  <br><br>
  <div v-color="color">
    Hello world!!!
  </div>
  <h2>Background</h2>
  <select v-model="color2">
    <option value="#f00">Red</option>
    <option value="#0f0">Green</option>
    <option value="#00f">Blue</option>
    <option value="#000" selected>Black</option>
  </select>
  <br><br>
  <div v-color:background="color2">
    Hello world!!!
  </div>

</div>

Answer 4

To properly utilize the directive, it's important to define the function outside of the directive and then invoke it within the lifecycle methods as illustrated in the example below.

Vue.directive("color", {

  "bind": function() {
    console.log("directive active");
    hello();
  },


  "unbind": function() {
    console.log("directive deactive");
  },


  "update": function(newValue, oldValue) {
    var el = $(this.el); 


    if (this.arg == 'background')
      el.css('background', newValue);
    else
      el.css('color', newValue);
  },
});

function hello() {
  console.log('hello');
}

new Vue({
  el: '#app'
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/1.0.24/vue.min.js"></script>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>

<div id="app>
  <h2>Color</h2>
  <select v-model="color">
    <option value="#f00">Red</option>
    <option value="#0f0">Green</option>
    <option value="#00f">Blue</option>
    <option value="#000" selected>Black</option>
  </select>
  <br><br>
  <div v-color="color">
    Hello world!!!
  </div>
  <h2>Background</h2>
  <select v-model="color2">
    <option value="#f00">Red</option>
    <option value="#0f0">Green</option>
    <option value="#00f">Blue</option>
    <option value="#000" selected>Black</option>
  </select>
  <br><br>
  <div v-color:background="color2">
    Hello world!!!
  </div>

</div>

Answer 5

Answer №3

Perhaps this information will benefit someone. The key is to encapsulate a directive within a constructor function.

function myDirective() {
  this.myMethod = function() {
    console.log('My method')
  }
  return {
    bind: function(el) {
      el.addEventListener('click', this.myMethod)
    }.bind(this),
    update: function() {
      this.myMethod()
    }.bind(this),
    unbind: function(el) {
      el.removeEventListener('click', this.method)
    }.bind()
  }
}

Vue.directive('myDirective', new myDirective())
new Vue({
  el: '#app'
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <button v-my-directive>Just a button</button>
</div>

Additionally, functions utilizing .bind(this) could be substituted with arrow functions () => {}.

Answer 6

Perhaps this information will benefit someone. The key is to encapsulate a directive within a constructor function.

function myDirective() {
  this.myMethod = function() {
    console.log('My method')
  }
  return {
    bind: function(el) {
      el.addEventListener('click', this.myMethod)
    }.bind(this),
    update: function() {
      this.myMethod()
    }.bind(this),
    unbind: function(el) {
      el.removeEventListener('click', this.method)
    }.bind()
  }
}

Vue.directive('myDirective', new myDirective())
new Vue({
  el: '#app'
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <button v-my-directive>Just a button</button>
</div>

Additionally, functions utilizing .bind(this) could be substituted with arrow functions () => {}.

What is the process for creating a method within a Vue directive?

Answer №1

Answer №2

Answer №3

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