Pass data from child to parent in Vuejs (is it so complicated?)

Question

Thanks for reading my question.

I have read about it:

vuejs update parent data from child component

https://forum.vuejs.org/t/passing-data-back-to-pa

Answer 1

Nightmare to find "hello world" example out there for $emit so I added the example below (Minimal lines of code + semantic names of functions).

"Hello world" On click change parent data

Vue.component('child', {
  template: `

CLICK - child Method pass data from product component

`,
  data: function () {
    return {
      child_msg: "message from child"
    }
  },
  methods: {
    childMethod: function() {
      this.$emit('child-method', this.child_msg)
    }
  }
})

var app = new Vue({
  el: '#app',
  data: {
    msg: "I am the blue parent!!!!!!!!!!!!!!!!!!",
  },
  methods: {
    updateParent(value_from_child) {
      this.msg = value_from_child;
      alert("hello child" + value_from_child)
    }
  }
})

.child{ background: gray; padding: 15px; }
button{ cursor: pointer; }
#app{ border: 1px red dashed; padding: 15px; background: lightblue; color: blue;
}

  
{{msg}}
  
  
 

codepen: https://codepen.io/ezra_siton/pen/YzyXNox?editors=1010