微信小程序 textarea 层级过高的解决方式

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建立一个新的textarea 组件代替原生textarea ,废话不多说,上代码

<template>
<view class="ui-textarea">
<textarea class="textarea {{ hide? 'hidden':''}}" auto-height maxlength="{{maxlength}}" name="{{ name }}" value="{{ txt }}" placeholder="{{ placeholder }}" bindinput="onInput" bindblur="onBlur" focus="{{focus}}"></textarea>
<view hidden="{{ hide == false }}" class="{{ txt === ''?'text placeholder':'text'}}" bindtap="onFocus">{{ txt ===''? placeholder:txt }}</view>
</view>
</template>
<script>
export default {
config: {
usingComponents: {}
},
behaviors: [],
properties: {
placeholder: {
type: String,
value: ''
},
maxlength: {
type: Number,
value: 128
},
name: String,
value: {
type: String,
value: ''
}
},
data: {
hide: true,
txt: '',
focus: false
},
ready() {
if (this.data.value != '') {
this.setData({ txt: this.data.value })
}
},
methods: {
onFocus() {
this.setData({ hide: false, focus: true })
},
onInput(e) {
this.setData({ txt: e.detail.value })
},
onBlur() {
this.setData({ hide: true, focus: false })
}
}
}
</script>
<style lang="less">
.ui-textarea {
position: relative !important; .textarea.hidden {
display: block !important;
position: absolute !important;
left: -999px;
right: -999px;
top: 0;
} .textarea {
width: 100%;
box-sizing: border-box;
} .text {
height: 100%;
padding: 6px 5px;
font-size: 14px;
} .placeholder {
color: #888;
}
}
</style>