Vue组件之Tooltip的示例代码
答案在风中飘着 人气:2前言
本文主要Alert 组件的大致框架, 提供少量可配置选项。 旨在大致提供思路
tooltip
常用于展示鼠标 hover 时的提示信息。
模板结构
<template> <div style="position:relative;"> <span ref="trigger"> <slot> </slot> </span> <div class="tooltip" v-bind:class="{ 'top': placement === 'top', 'left': placement === 'left', 'right': placement === 'right', 'bottom': placement === 'bottom', 'disable': type === 'disable', 'delete': type === 'delete', 'visible': show === true }" ref="popover" role="tooltip"> <div class="tooltip-arrow"></div> <div class="tooltip-inner"> <slot name="content" v-html="content"></slot> </div> </div> </div> </template>
大致结构DOM结构 一个div 包含 箭头 及 气泡内容。
v-bind中可选tooltip位置,是否禁用,及显示隐藏
slot 差值供自定义 默认接收content内容
script
import EventListener from '../utils/EventListener.js'; export default { props: { // 需要监听的事件 trigger: { type: String, default: 'click' }, effect: { type: String, default: 'fadein' }, title: { type: String }, // toolTip消息提示 content: { type: String }, header: { type: Boolean, default: true }, placement: { type: String } }, data() { return { // 通过计算所得 气泡位置 position: { top: 0, left: 0 }, show: true }; }, watch: { show: function(val) { if (val) { const popover = this.$refs.popover; const triger = this.$refs.trigger.children[0]; // 通过placement计算出位子 switch (this.placement) { case 'top' : this.position.left = triger.offsetLeft - popover.offsetWidth / 2 + triger.offsetWidth / 2; this.position.top = triger.offsetTop - popover.offsetHeight; break; case 'left': this.position.left = triger.offsetLeft - popover.offsetWidth; this.position.top = triger.offsetTop + triger.offsetHeight / 2 - popover.offsetHeight / 2; break; case 'right': this.position.left = triger.offsetLeft + triger.offsetWidth; this.position.top = triger.offsetTop + triger.offsetHeight / 2 - popover.offsetHeight / 2; break; case 'bottom': this.position.left = triger.offsetLeft - popover.offsetWidth / 2 + triger.offsetWidth / 2; this.position.top = triger.offsetTop + triger.offsetHeight; break; default: console.log('Wrong placement prop'); } popover.style.top = this.position.top + 'px'; popover.style.left = this.position.left + 'px'; } } }, methods: { toggle() { this.show = !this.show; } }, mounted() { if (!this.$refs.popover) return console.error("Couldn't find popover ref in your component that uses popoverMixin."); // 获取监听对象 const triger = this.$refs.trigger.children[0]; // 根据trigger监听特定事件 if (this.trigger === 'hover') { this._mouseenterEvent = EventListener.listen(triger, 'mouseenter', () => { this.show = true; }); this._mouseleaveEvent = EventListener.listen(triger, 'mouseleave', () => { this.show = false; }); } else if (this.trigger === 'focus') { this._focusEvent = EventListener.listen(triger, 'focus', () => { this.show = true; }); this._blurEvent = EventListener.listen(triger, 'blur', () => { this.show = false; }); } else { this._clickEvent = EventListener.listen(triger, 'click', this.toggle); } this.show = !this.show; }, // 在组件销毁前移除监听,释放内存 beforeDestroy() { if (this._blurEvent) { this._blurEvent.remove(); this._focusEvent.remove(); } if (this._mouseenterEvent) { this._mouseenterEvent.remove(); this._mouseleaveEvent.remove(); } if (this._clickEvent) this._clickEvent.remove(); } };
// EventListener.js const EventListener = { /** * Listen to DOM events during the bubble phase. * * @param {DOMEventTarget} target DOM element to register listener on. * @param {string} eventType Event type, e.g. 'click' or 'mouseover'. * @param {function} callback Callback function. * @return {object} Object with a `remove` method. */ listen(target, eventType, callback) { if (target.addEventListener) { target.addEventListener(eventType, callback, false); return { remove() { target.removeEventListener(eventType, callback, false); } }; } else if (target.attachEvent) { target.attachEvent('on' + eventType, callback); return { remove() { target.detachEvent('on' + eventType, callback); } }; } } }; export default EventListener;
封装的事件监听
使用
使用content属性来决定hover时的提示信息。由placement属性决定展示效果:placement属性值为:方向-对齐位置;四个方向:top、left、right、bottom。trigger属性用于设置触发tooltip的方式,默认为hover。
<d-tooltip content="我是tooltip"> <d-button type="text">鼠标移动到我上面试试<https://img.qb5200.com/download-x/d-button> <https://img.qb5200.com/download-x/d-tooltip> <d-tooltip content="我是tooltip" trigger="click"> <d-button type="text">点我试试<https://img.qb5200.com/download-x/d-button> <https://img.qb5200.com/download-x/d-tooltip>
content内容分发
设置一个名为content的slot。
<d-tooltip> <d-button type="text">鼠标移动到我上面试试<https://img.qb5200.com/download-x/d-button> <p slot="content" class="tooltip-content">我是内容分发的conent。</p> <https://img.qb5200.com/download-x/d-tooltip>
Attributes
参数 | 说明 | 类型 | 可选值 | 默认值 |
---|---|---|---|---|
content | 显示的内容,也可以通过 slot#content 传入 DOM | String | — | — |
placement | Tooltip 的出现位置 | String | top/right/bottom/left | top |
trigger | tooltip触发方式 | String | — | hover |
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