Vue.js

Vue.js is used for building user interfaces in GitLab, specifically for front-end interactions.

Components

Vue.js components are reusable building blocks for constructing the UI. These components can be nested to create complex layouts.

Example:

<template>
            <div class="issue-list">
              <IssueItem
                v-for="issue in issues"
                :key="issue.id"
                :issue="issue"
              />
            </div>
          </template>
          
          <script>
          import IssueItem from './IssueItem.vue';
          
          export default {
            components: {
              IssueItem
            },
            data() {
              return {
                issues: [
                  // ... list of issues
                ]
              };
            }
          };
          </script>
          

Reactivity

Vue.js’s reactivity system allows data changes to be reflected in the UI automatically.

Example:

<template>
            <div>
              <p>Count: {{ count }}</p>
              <button @click="incrementCount">Increment</button>
            </div>
          </template>
          
          <script>
          export default {
            data() {
              return {
                count: 0
              };
            },
            methods: {
              incrementCount() {
                this.count++;
              }
            }
          };
          </script>
          

Directives

Directives extend HTML attributes with Vue.js functionality.

Example:

<template>
            <div v-if="showGreeting">
              Hello, {{ name }}!
            </div>
          </template>
          
          <script>
          export default {
            data() {
              return {
                showGreeting: true,
                name: 'John Doe'
              };
            }
          };
          </script>
          

Events

Vue.js allows for handling events in the UI.

Example:

<template>
            <button @click="handleClick">Click me</button>
          </template>
          
          <script>
          export default {
            methods: {
              handleClick() {
                // Perform some action on click
              }
            }
          };
          </script>
          

Routing

Vue Router allows for managing navigation between different views in the application.

Example:

// routes.js
          import Home from './components/Home.vue';
          import About from './components/About.vue';
          
          const routes = [
            { path: '/', component: Home },
            { path: '/about', component: About }
          ];
          
          export default routes;
          

State Management

Vuex provides a centralized state management solution for complex applications.

Example:

// store.js
          import Vue from 'vue';
          import Vuex from 'vuex';
          
          Vue.use(Vuex);
          
          const store = new Vuex.Store({
            state: {
              count: 0
            },
            mutations: {
              increment(state) {
                state.count++;
              }
            }
          });
          
          export default store;
          

Testing

Vue.js applications can be tested using various tools like Jest and Cypress.

Example:

// components/MyComponent.spec.js
          import { shallowMount } from '@vue/test-utils';
          import MyComponent from './MyComponent.vue';
          
          describe('MyComponent', () => {
            it('renders a message', () => {
              const wrapper = shallowMount(MyComponent);
              expect(wrapper.text()).toContain('Hello, world!');
            });
          });
          

This outline provides a brief overview of how Vue.js is utilized within the GitLab codebase. For a more comprehensive understanding, refer to the specific code files and the Vue.js documentation.