vue实现带样式的textarea输入框，contenteditable属性应用
<template>
<div class="tctextarea_box">
<div id="tctextarea" class="tctextarea" contenteditable="plaintext-only" @focus="focusTxt" @input="inputTxt" @blur="blurTxt" v-html="txtHtml"></div>
</div>
</template>
<script>
export default {
name: "TextareaComponent",
computed: {},
props: {
},
data(){
return{
tipData:['输入框第一条提示','输入框第二条提示','输入框第三条提示','输入框第四条提示','输入框第五条提示'],
txtData:[],
txtHtml:'',
txtStr:'',
}
},
created(){
this.createTipHtml();
},
methods: {
//textarea输入
inputTxt(e) {
},
//获取焦点
focusTxt(e) {
//获取焦点时，输入框文字为黑色
if(e.target.innerHTML){
if(e.target.innerHTML.indexOf('#FF4019')>-1){
let arr = e.target.innerHTML.split('#FF4019');
let str = '';
for(let i=0;i<arr.length;i++){
str+=arr[i];
if(i!==arr.length-1){
str+='#323D4D';
}
}
e.target.innerHTML = str;
this.focusTextarea();
}
}
//输入框获得焦点时内容为初始提示，清空提示
if(this.txtHtml.indexOf(this.tipData[0])>-1){
this.txtHtml = '';
this.focusTextarea();
}
},
//主动使textarea获取焦点
focusTextarea(){
let node = document.getElementById('tctextarea');
if(window.getSelection){
let range = window.getSelection();
range.selectAllChildren(node);
// ();
range.collapseToEnd();
}else{
let range = document.selection.createRange();
range.moveToElementText(node);
range.collapse(false);
range.select();
}
},
//失去焦点
blurTxt(e) {
//如果输入内容为'' 出现提示
let str = e.target.innerText?e.target.innerText.trim():'';
if(str.length<1){
this.createTipHtml();
}else{
this.txtStr = e.target.innerText;
this.createInputHtml();
}
},
//创建提示文字
createTipHtml(){
let temp = '';
for(let i=0;i<this.tipData.length;i++){
temp+=`<div class="tctip_item" style="font-size: 14px; color: ${i==0?'#F77700':'#A2AEBF'} ;line-height: 24px; display: flex; box-sizing: border-box; padding-bottom:5px;margin-:0;"><div class="tctip_l" style="width: 20px;">${i+1}.</div><div class="tctip_r" style="flex-grow:1;">${this.tipData[i]}</div></div>`
}
this.txtHtml = temp;
},
//创建输入内容
createInputHtml(str,colorType,splitStr){
let temp = '';
let splitTxt = splitStr||'\n';
let data= this.deleteSpace(str||this.txtStr).split(splitTxt);
let newData = [];
for(let i=0;i<data.length;i++){
if(data[i]!=''){
//输入内容文字默认为黑色 当输入内容查询不到时 显示为红色
temp+=`<div class="tctxt_item" style="font-size:14px;color:${colorType?'#FF4019':'#323D4D'};line-height:24px;">${data[i]}</div>`;
newData.push(data[i])
}
}
this.txtHtml = temp;
//触发父组件事件
this.$emit('changeTextareaValue',newData);
},
//删除字符串中的空格
deleteSpace(str){
let data = [];
if(str){
data = str.split(' ');
}else{
data = this.txtStr.split(' ');
}
let newStr='';
for(let i=0;i<data.length;i++){
if(data[i]!=''){
newStr+=data[i];
}
}
return newStr
},
},
};
</script>
<style lang="less" scoped>
.tctextarea_box{
width: 100%;
height: 100%;
}
.tctextarea{
width: 100%;
height: 100%;
box-sizing: border-box;
padding: 20px;
// border: 1px solid #eee;
overflow-y:auto;
display: inline-block;
outline: none;
caret-color:red;
font-size:14px;
color:#323D4D;
line-height:24px;
}
.tctextarea::-webkit-scrollbar-thumb{
display: block;
cursor: pointer;
}
</style>