81 lines
1.9 KiB
JavaScript
81 lines
1.9 KiB
JavaScript
// components/expandabletext/expandabletext.js
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/**
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* 长文本内容展开与收起
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* @param {String} content 长文本内容
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* @param {Number} maxline 最多展示行数[只允许 1-5 的正整数]
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* @param {String} position 展开收起按钮位置[可选值为 left right]
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* @param {Boolean} foldable 点击长文本是否展开收起
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*/
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Component({
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options: {
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addGlobalClass: true
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},
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/**
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* 组件的属性列表
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*/
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properties: {
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content: {
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type: String,
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observer(val) {
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console.log(val)
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if (this.data.onReady) {
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setTimeout(() => this.checkFold(), 10)
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}
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}
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},
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maxline: {
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type: Number,
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value: 1,
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observer(value) {
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if (!(/^[1-5]$/).test(value)) {
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throw new Error(`Maxline field value can only be digits (1-5), Error value: ${value}`)
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} else if (this.data.onReady) {
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setTimeout(() => this.checkFold(), 10)
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}
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}
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},
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position: {
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type: String,
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value: "left"
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},
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foldable: {
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type: Boolean,
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value: true
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}
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},
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/**
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* 组件的初始数据
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*/
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data: {
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onFold: false,
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showFold: false,
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onReady: false
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},
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lifetimes: {
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ready() {
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this.checkFold()
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this.data.onReady = true
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}
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},
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/**
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* 组件的方法列表
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*/
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methods: {
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checkFold() {
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const query = wx.createSelectorQuery().in(this);
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query.selectAll(".showArea, .hideArea").boundingClientRect(res => {
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this.setData({
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showFold: res[0].height < res[1].height
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})
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}).exec()
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},
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handleFold() {
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this.setData({
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onFold: !this.data.onFold
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})
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}
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}
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})
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