Vue.js--标签页组件

喜欢ヅ旅行 2021-08-13 12:52 492阅读 0赞

#### 效果 ####

![在这里插入图片描述][2019102022454829.png]

#### 入口页 index.html ####

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>标签页组件</title>
        <link rel="stylesheet" type="text/css" href="style.css">
    </head>
    <body>
        <div id="app" v-cloak>
            <tabs v-model="activeKey">
                <pane label="标签一" name="1">
                    标签一的内容
                </pane>
                <pane label="标签二" name="2">
                    标签二的内容
                </pane>
                <pane label="标签三" name="3">
                    标签三的内容
                </pane>
            </tabs>
        </div>
        <script src="https://unpkg.com/vue/dist/vue.js"></script>
        <script src="pane.js"></script>
        <script src="tabs.js"></script>
        <script type="text/javascript"> var app = new Vue({ el: '#app', data: { activeKey: '1' } }); </script>
    </body>
    </html>

#### 样式表 style.css ####

[v-clock]{ 
        display: none;
    }
    .tabs{ 
        font-size: 14px;
        color: #657180
    }
    .tabs-bar:after{ 
        content: '';
        display: block;
        width: 100%;
        height: 1px;
        background: #d7dde4;
        margin-top: -1px;
    }
    .tabs-tab{ 
        display: inline-block;
        padding: 4px 16px;
        margin-right: 6px;
        background: #fff;
        border: 1px solid #d7dde4;
        cursor: pointer;
        position: relative;
    }
    .tabs-tab-active{ 
        color: #ee99ff;
        border-top: 1px solid #3399ff;
        border-bottom: 1px solid #fff;
    }
    .tabs-tab-active:befor{ 
        content: '';
        display: block;
        height: 1px;
        background: #3399ff;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
    }
    .tabs-content{ 
        padding: 8px 0;
    }

#### 标签页外层的组件tabs tabs.js ####

Vue.component('tabs',{ 
        template: '\ <div class="tabs">\ <div class="tabs-bar">\ \ <div \ :class="tabCls(item)"\ v-for="(item, index) in navList"\ @click="handleChange(index)">\ { {item.label}}\ </div>\ </div>\ <div class="tabs-content">\ \ <slot></slot>\ </div>\ </div>',
        props: { 
            value: { 
                type: [String, Number]
            }
        },
        data: function () { 
            return { 
                //用于渲染tabs的标题
                currentValue: this.value,
                navList: []
            }
        },
        methods: { 
            tabCls(item){ 
                return [
                    'tabs-tab',
                    { 
                        'tabs-tab-active': item.name === this.currentValue
                    }
                ]
            },
            getTabs(){ 
                //通过遍历子组件，得到所有的pane组件
                return this.$children.filter(function (item) { 
                    return item.$options.name === 'pane';
                });
            },
            updateNav(){ 
                this.navList = [];
                //设置对this的引用，在function回调里，this的指向的并不是Vue实例
                var _this = this;
    
                this.getTabs().forEach((pane, index) => { 
                    _this.navList.push({ 
                        label: pane.label,
                        name: pane.name || index
                    });
                    //如果没有给pane设置name，默认设置它的索引
                    if(!pane.name)
                        pane.name = index;
                    //设置当前选中的tab的索引
                    if(index === 0){ 
                        if(!_this.currentValue){ 
                            _this.currentValue = pane.name || index;
                        }
                    }
                });
                this.updateStatus();
            },
            updateStatus(){ 
                var tabs = this.getTabs();
                var _this = this;
                //显示当前选中的tab对应的pane组件，隐藏没有选中的
                tabs.forEach(tab => { 
                    return tab.show = tab.name === _this.currentValue;
                });
            },
            handleChange: function (index) { 
                var nav = this.navList[index];
                var name = nav.name;
                this.currentValue = name;
                this.$emit('input', name);
                this.$emit('on-click', name);
            }
        },
        watch: { 
            value: val => { 
                this.currentValue = val;
            },
            currentValue: function () { 
                this.updateStatus();
            }
        }
    });

#### 标签页嵌套的组件pane pane.js ####

Vue.component('pane',{ 
        name: 'pane',
        template: '\ <div class="pane" v-show="show">\ <slot></slot>\ </div>',
        data: function () { 
            return { 
                show: true
            }
        },
        props: { 
            name: { 
                type: String
            },
            label: { 
                type: String,
                default: ''
            }
        },
        methods: { 
            updateNav: function () { 
                this.$parent.updateNav();
            }
        },
        watch: { 
            label: function () { 
                this.updateNav();
            }
        },
        mounted: function () { 
            this.updateNav();
        }
    });

[2019102022454829.png]: /images/20210813/a44932e5c1cc4e6293cc79fe08e0fe0d.png